1 | """ |
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2 | CanSAS data reader - new recursive cansas_version. |
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3 | """ |
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4 | ############################################################################ |
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5 | #This software was developed by the University of Tennessee as part of the |
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6 | #Distributed Data Analysis of Neutron Scattering Experiments (DANSE) |
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7 | #project funded by the US National Science Foundation. |
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8 | #If you use DANSE applications to do scientific research that leads to |
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9 | #publication, we ask that you acknowledge the use of the software with the |
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10 | #following sentence: |
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11 | #This work benefited from DANSE software developed under NSF award DMR-0520547. |
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12 | #copyright 2008,2009 University of Tennessee |
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13 | ############################################################################# |
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14 | |
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15 | import logging |
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16 | import numpy |
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17 | import os |
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18 | import sys |
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19 | import datetime |
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20 | import inspect |
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21 | # For saving individual sections of data |
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22 | from sas.dataloader.data_info import Data1D |
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23 | from sas.dataloader.data_info import Collimation |
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24 | from sas.dataloader.data_info import TransmissionSpectrum |
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25 | from sas.dataloader.data_info import Detector |
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26 | from sas.dataloader.data_info import Process |
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27 | from sas.dataloader.data_info import Aperture |
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28 | import sas.dataloader.readers.xml_reader as xml_reader |
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29 | from sas.dataloader.readers.xml_reader import XMLreader |
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30 | from sas.dataloader.readers.cansas_constants import CansasConstants |
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31 | |
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32 | # The following 2 imports *ARE* used. Do not remove either. |
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33 | import xml.dom.minidom |
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34 | from xml.dom.minidom import parseString |
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35 | |
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36 | _ZERO = 1e-16 |
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37 | PREPROCESS = "xmlpreprocess" |
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38 | ENCODING = "encoding" |
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39 | RUN_NAME_DEFAULT = "None" |
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40 | HAS_CONVERTER = True |
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41 | try: |
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42 | from sas.data_util.nxsunit import Converter |
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43 | except ImportError: |
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44 | HAS_CONVERTER = False |
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45 | |
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46 | CONSTANTS = CansasConstants() |
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47 | CANSAS_FORMAT = CONSTANTS.format |
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48 | CANSAS_NS = CONSTANTS.names |
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49 | ALLOW_ALL = True |
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50 | |
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51 | # DO NOT REMOVE Called by outside packages: |
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52 | # sas.perspectives.invariant.invariant_state |
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53 | # sas.perspectives.fitting.pagestate |
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54 | def get_content(location, node): |
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55 | """ |
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56 | Get the first instance of the content of a xpath location. |
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57 | |
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58 | :param location: xpath location |
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59 | :param node: node to start at |
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60 | |
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61 | :return: Element, or None |
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62 | """ |
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63 | nodes = node.xpath(location, |
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64 | namespaces={'ns': CANSAS_NS.get("1.0").get("ns")}) |
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65 | if len(nodes) > 0: |
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66 | return nodes[0] |
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67 | else: |
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68 | return None |
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69 | |
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70 | # DO NOT REMOVE Called by outside packages: |
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71 | # sas.perspectives.fitting.pagestate |
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72 | def write_node(doc, parent, name, value, attr=None): |
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73 | """ |
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74 | :param doc: document DOM |
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75 | :param parent: parent node |
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76 | :param name: tag of the element |
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77 | :param value: value of the child text node |
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78 | :param attr: attribute dictionary |
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79 | |
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80 | :return: True if something was appended, otherwise False |
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81 | """ |
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82 | if attr is None: |
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83 | attr = {} |
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84 | if value is not None: |
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85 | node = doc.createElement(name) |
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86 | node.appendChild(doc.createTextNode(str(value))) |
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87 | for item in attr: |
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88 | node.setAttribute(item, attr[item]) |
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89 | parent.appendChild(node) |
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90 | return True |
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91 | return False |
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92 | |
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93 | class Reader(XMLreader): |
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94 | """ |
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95 | Class to load cansas 1D XML files |
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96 | |
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97 | :Dependencies: |
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98 | The CanSAS reader requires PyXML 0.8.4 or later. |
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99 | """ |
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100 | ##CanSAS version - defaults to version 1.0 |
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101 | cansas_version = "1.0" |
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102 | base_ns = "{cansas1d/1.0}" |
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103 | logging = None |
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104 | errors = None |
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105 | type_name = "canSAS" |
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106 | ## Wildcards |
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107 | type = ["XML files (*.xml)|*.xml", "SasView Save Files (*.svs)|*.svs"] |
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108 | ## List of allowed extensions |
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109 | ext = ['.xml', '.XML', '.svs', '.SVS'] |
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110 | ## Flag to bypass extension check |
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111 | allow_all = True |
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112 | |
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113 | def __init__(self): |
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114 | ## List of errors |
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115 | self.errors = set() |
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116 | self.logging = [] |
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117 | self.encoding = None |
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118 | |
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119 | def is_cansas(self, ext="xml"): |
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120 | """ |
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121 | Checks to see if the xml file is a CanSAS file |
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122 | |
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123 | :param ext: The file extension of the data file |
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124 | """ |
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125 | if self.validate_xml(): |
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126 | name = "{http://www.w3.org/2001/XMLSchema-instance}schemaLocation" |
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127 | value = self.xmlroot.get(name) |
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128 | if CANSAS_NS.get(self.cansas_version).get("ns") == \ |
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129 | value.rsplit(" ")[0]: |
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130 | return True |
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131 | if ext == "svs": |
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132 | return True |
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133 | return False |
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134 | |
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135 | def load_file_and_schema(self, xml_file): |
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136 | """ |
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137 | Loads the file and associates a schema, if a known schema exists |
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138 | |
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139 | :param xml_file: The xml file path sent to Reader.read |
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140 | """ |
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141 | base_name = xml_reader.__file__ |
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142 | base_name = base_name.replace("\\", "/") |
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143 | base = base_name.split("/sas/")[0] |
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144 | |
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145 | # Load in xml file and get the cansas version from the header |
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146 | self.set_xml_file(xml_file) |
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147 | self.cansas_version = self.xmlroot.get("version", "1.0") |
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148 | |
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149 | # Generic values for the cansas file based on the version |
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150 | cansas_defaults = CANSAS_NS.get(self.cansas_version, "1.0") |
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151 | schema_path = "{0}/sas/dataloader/readers/schema/{1}".format\ |
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152 | (base, cansas_defaults.get("schema")).replace("\\", "/") |
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153 | |
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154 | # Link a schema to the XML file. |
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155 | self.set_schema(schema_path) |
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156 | return cansas_defaults |
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157 | |
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158 | def read(self, xml_file): |
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159 | """ |
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160 | Validate and read in an xml_file file in the canSAS format. |
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161 | |
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162 | :param xml_file: A canSAS file path in proper XML format |
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163 | """ |
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164 | # output - Final list of Data1D objects |
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165 | output = [] |
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166 | # ns - Namespace hierarchy for current xml_file object |
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167 | ns_list = [] |
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168 | |
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169 | # Check that the file exists |
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170 | if os.path.isfile(xml_file): |
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171 | basename = os.path.basename(xml_file) |
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172 | _, extension = os.path.splitext(basename) |
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173 | # If the file type is not allowed, return nothing |
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174 | if extension in self.ext or self.allow_all: |
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175 | # Get the file location of |
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176 | cansas_defaults = self.load_file_and_schema(xml_file) |
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177 | |
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178 | # Try to load the file, but raise an error if unable to. |
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179 | # Check the file matches the XML schema |
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180 | try: |
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181 | if self.is_cansas(extension): |
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182 | # Get each SASentry from XML file and add it to a list. |
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183 | entry_list = self.xmlroot.xpath( |
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184 | '/ns:SASroot/ns:SASentry', |
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185 | namespaces={'ns': cansas_defaults.get("ns")}) |
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186 | ns_list.append("SASentry") |
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187 | |
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188 | # If multiple files, modify the name for each is unique |
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189 | increment = 0 |
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190 | # Parse each SASentry item |
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191 | for entry in entry_list: |
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192 | # Define a new Data1D object with zeroes for |
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193 | # x_vals and y_vals |
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194 | data1d = Data1D(numpy.empty(0), numpy.empty(0), |
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195 | numpy.empty(0), numpy.empty(0)) |
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196 | data1d.dxl = numpy.empty(0) |
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197 | data1d.dxw = numpy.empty(0) |
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198 | |
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199 | # If more than one SASentry, increment each in order |
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200 | name = basename |
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201 | if len(entry_list) - 1 > 0: |
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202 | name += "_{0}".format(increment) |
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203 | increment += 1 |
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204 | |
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205 | # Set the Data1D name and then parse the entry. |
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206 | # The entry is appended to a list of entry values |
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207 | data1d.filename = name |
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208 | data1d.meta_data["loader"] = "CanSAS 1D" |
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209 | |
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210 | # Get all preprocessing events and encoding |
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211 | self.set_processing_instructions() |
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212 | data1d.meta_data[PREPROCESS] = \ |
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213 | self.processing_instructions |
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214 | |
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215 | # Parse the XML file |
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216 | return_value, extras = \ |
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217 | self._parse_entry(entry, ns_list, data1d) |
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218 | del extras[:] |
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219 | |
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220 | return_value = self._final_cleanup(return_value) |
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221 | output.append(return_value) |
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222 | else: |
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223 | output.append("Invalid XML at: {0}".format(\ |
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224 | self.find_invalid_xml())) |
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225 | except: |
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226 | # If the file does not match the schema, raise this error |
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227 | raise RuntimeError, "%s cannot be read" % xml_file |
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228 | return output |
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229 | # Return a list of parsed entries that dataloader can manage |
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230 | return None |
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231 | |
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232 | def _final_cleanup(self, data1d): |
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233 | """ |
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234 | Final cleanup of the Data1D object to be sure it has all the |
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235 | appropriate information needed for perspectives |
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236 | |
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237 | :param data1d: Data1D object that has been populated |
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238 | """ |
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239 | # Final cleanup |
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240 | # Remove empty nodes, verify array sizes are correct |
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241 | for error in self.errors: |
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242 | data1d.errors.append(error) |
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243 | self.errors.clear() |
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244 | numpy.trim_zeros(data1d.x) |
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245 | numpy.trim_zeros(data1d.y) |
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246 | numpy.trim_zeros(data1d.dy) |
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247 | size_dx = data1d.dx.size |
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248 | size_dxl = data1d.dxl.size |
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249 | size_dxw = data1d.dxw.size |
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250 | if data1d._xunit != data1d.x_unit: |
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251 | data1d.x_unit = data1d._xunit |
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252 | if data1d._yunit != data1d.y_unit: |
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253 | data1d.y_unit = data1d._yunit |
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254 | if size_dxl == 0 and size_dxw == 0: |
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255 | data1d.dxl = None |
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256 | data1d.dxw = None |
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257 | numpy.trim_zeros(data1d.dx) |
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258 | elif size_dx == 0: |
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259 | data1d.dx = None |
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260 | size_dx = size_dxl |
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261 | numpy.trim_zeros(data1d.dxl) |
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262 | numpy.trim_zeros(data1d.dxw) |
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263 | return data1d |
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264 | |
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265 | def _create_unique_key(self, dictionary, name, numb=0): |
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266 | """ |
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267 | Create a unique key value for any dictionary to prevent overwriting |
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268 | Recurses until a unique key value is found. |
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269 | |
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270 | :param dictionary: A dictionary with any number of entries |
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271 | :param name: The index of the item to be added to dictionary |
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272 | :param numb: The number to be appended to the name, starts at 0 |
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273 | """ |
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274 | if dictionary.get(name) is not None: |
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275 | numb += 1 |
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276 | name = name.split("_")[0] |
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277 | name += "_{0}".format(numb) |
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278 | name = self._create_unique_key(dictionary, name, numb) |
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279 | return name |
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280 | |
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281 | def _unit_conversion(self, node, new_current_level, data1d, \ |
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282 | tagname, node_value): |
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283 | """ |
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284 | A unit converter method used to convert the data included in the file |
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285 | to the default units listed in data_info |
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286 | |
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287 | :param new_current_level: cansas_constants level as returned by |
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288 | iterate_namespace |
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289 | :param attr: The attributes of the node |
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290 | :param data1d: Where the values will be saved |
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291 | :param node_value: The value of the current dom node |
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292 | """ |
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293 | attr = node.attrib |
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294 | value_unit = '' |
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295 | err_msg = None |
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296 | default_unit = None |
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297 | if 'unit' in attr and new_current_level.get('unit') is not None: |
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298 | try: |
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299 | local_unit = attr['unit'] |
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300 | if isinstance(node_value, float) is False: |
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301 | exec("node_value = float({0})".format(node_value)) |
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302 | unitname = new_current_level.get("unit") |
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303 | exec "default_unit = data1d.{0}".format(unitname) |
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304 | if local_unit is not None and default_unit is not None and \ |
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305 | local_unit.lower() != default_unit.lower() \ |
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306 | and local_unit.lower() != "none": |
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307 | if HAS_CONVERTER == True: |
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308 | ## Check local units - bad units raise KeyError |
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309 | data_conv_q = Converter(local_unit) |
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310 | value_unit = default_unit |
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311 | node_value = data_conv_q(node_value, units=default_unit) |
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312 | else: |
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313 | value_unit = local_unit |
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314 | err_msg = "Unit converter is not available.\n" |
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315 | else: |
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316 | value_unit = local_unit |
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317 | except KeyError: |
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318 | err_msg = "CanSAS reader: unexpected " |
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319 | err_msg += "\"{0}\" unit [{1}]; " |
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320 | err_msg = err_msg.format(tagname, local_unit) |
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321 | err_msg += "expecting [{0}]".format(default_unit) |
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322 | value_unit = local_unit |
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323 | except: |
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324 | err_msg = "CanSAS reader: unknown error converting " |
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325 | err_msg += "\"{0}\" unit [{1}]" |
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326 | err_msg = err_msg.format(tagname, local_unit) |
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327 | value_unit = local_unit |
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328 | elif 'unit' in attr: |
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329 | value_unit = attr['unit'] |
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330 | if err_msg: |
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331 | self.errors.add(err_msg) |
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332 | node_value = "float({0})".format(node_value) |
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333 | return node_value, value_unit |
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334 | |
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335 | def _check_for_empty_data(self, data1d): |
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336 | """ |
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337 | Creates an empty data set if no data is passed to the reader |
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338 | |
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339 | :param data1d: presumably a Data1D object |
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340 | """ |
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341 | if data1d == None: |
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342 | self.errors = set() |
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343 | x_vals = numpy.empty(0) |
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344 | y_vals = numpy.empty(0) |
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345 | dx_vals = numpy.empty(0) |
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346 | dy_vals = numpy.empty(0) |
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347 | dxl = numpy.empty(0) |
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348 | dxw = numpy.empty(0) |
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349 | data1d = Data1D(x_vals, y_vals, dx_vals, dy_vals) |
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350 | data1d.dxl = dxl |
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351 | data1d.dxw = dxw |
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352 | return data1d |
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353 | |
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354 | def _handle_special_cases(self, tagname, data1d, children): |
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355 | """ |
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356 | Handle cases where the data type in Data1D is a dictionary or list |
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357 | |
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358 | :param tagname: XML tagname in use |
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359 | :param data1d: The original Data1D object |
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360 | :param children: Child nodes of node |
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361 | :param node: existing node with tag name 'tagname' |
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362 | """ |
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363 | if tagname == "SASdetector": |
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364 | data1d = Detector() |
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365 | elif tagname == "SAScollimation": |
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366 | data1d = Collimation() |
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367 | elif tagname == "SAStransmission_spectrum": |
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368 | data1d = TransmissionSpectrum() |
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369 | elif tagname == "SASprocess": |
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370 | data1d = Process() |
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371 | for child in children: |
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372 | if child.tag.replace(self.base_ns, "") == "term": |
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373 | term_attr = {} |
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374 | for attr in child.keys(): |
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375 | term_attr[attr] = \ |
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376 | ' '.join(child.get(attr).split()) |
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377 | if child.text is not None: |
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378 | term_attr['value'] = \ |
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379 | ' '.join(child.text.split()) |
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380 | data1d.term.append(term_attr) |
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381 | elif tagname == "aperture": |
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382 | data1d = Aperture() |
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383 | if tagname == "Idata" and children is not None: |
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384 | data1d = self._check_for_empty_resolution(data1d, children) |
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385 | return data1d |
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386 | |
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387 | def _check_for_empty_resolution(self, data1d, children): |
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388 | """ |
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389 | A method to check all resolution data sets are the same size as I and Q |
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390 | """ |
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391 | dql_exists = False |
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392 | dqw_exists = False |
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393 | dq_exists = False |
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394 | di_exists = False |
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395 | for child in children: |
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396 | tag = child.tag.replace(self.base_ns, "") |
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397 | if tag == "dQl": |
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398 | dql_exists = True |
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399 | if tag == "dQw": |
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400 | dqw_exists = True |
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401 | if tag == "Qdev": |
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402 | dq_exists = True |
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403 | if tag == "Idev": |
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404 | di_exists = True |
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405 | if dqw_exists and dql_exists == False: |
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406 | data1d.dxl = numpy.append(data1d.dxl, 0.0) |
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407 | elif dql_exists and dqw_exists == False: |
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408 | data1d.dxw = numpy.append(data1d.dxw, 0.0) |
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409 | elif dql_exists == False and dqw_exists == False \ |
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410 | and dq_exists == False: |
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411 | data1d.dx = numpy.append(data1d.dx, 0.0) |
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412 | if di_exists == False: |
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413 | data1d.dy = numpy.append(data1d.dy, 0.0) |
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414 | return data1d |
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415 | |
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416 | def _restore_original_case(self, |
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417 | tagname_original, |
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418 | tagname, |
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419 | save_data1d, |
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420 | data1d): |
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421 | """ |
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422 | Save the special case data to the appropriate location and restore |
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423 | the original Data1D object |
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424 | |
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425 | :param tagname_original: Unmodified tagname for the node |
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426 | :param tagname: modified tagname for the node |
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427 | :param save_data1d: The original Data1D object |
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428 | :param data1d: If a special case was handled, an object of that type |
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429 | """ |
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430 | if tagname_original == "SASdetector": |
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431 | save_data1d.detector.append(data1d) |
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432 | elif tagname_original == "SAScollimation": |
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433 | save_data1d.collimation.append(data1d) |
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434 | elif tagname == "SAStransmission_spectrum": |
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435 | save_data1d.trans_spectrum.append(data1d) |
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436 | elif tagname_original == "SASprocess": |
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437 | save_data1d.process.append(data1d) |
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438 | elif tagname_original == "aperture": |
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439 | save_data1d.aperture.append(data1d) |
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440 | else: |
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441 | save_data1d = data1d |
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442 | return save_data1d |
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443 | |
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444 | def _handle_attributes(self, node, data1d, cs_values, tagname): |
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445 | """ |
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446 | Process all of the attributes for a node |
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447 | """ |
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448 | attr = node.attrib |
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449 | if attr is not None: |
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450 | for key in node.keys(): |
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451 | try: |
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452 | node_value, unit = self._get_node_value(node, cs_values, \ |
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453 | data1d, tagname) |
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454 | cansas_attrib = \ |
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455 | cs_values.current_level.get("attributes").get(key) |
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456 | attrib_variable = cansas_attrib.get("variable") |
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457 | if key == 'unit' and unit != '': |
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458 | attrib_value = unit |
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459 | else: |
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460 | attrib_value = node.attrib[key] |
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461 | store_attr = attrib_variable.format("data1d", |
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462 | attrib_value, |
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463 | key, |
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464 | node_value) |
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465 | exec store_attr |
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466 | except AttributeError: |
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467 | pass |
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468 | return data1d |
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469 | |
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470 | def _get_node_value(self, node, cs_values, data1d, tagname): |
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471 | """ |
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472 | Get the value of a node and any applicable units |
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473 | |
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474 | :param node: The XML node to get the value of |
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475 | :param cs_values: A CansasConstants.CurrentLevel object |
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476 | :param attr: The node attributes |
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477 | :param dataid: The working object to be modified |
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478 | :param tagname: The tagname of the node |
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479 | """ |
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480 | #Get the text from the node and convert all whitespace to spaces |
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481 | units = '' |
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482 | node_value = node.text |
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483 | if node_value == "": |
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484 | node_value = None |
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485 | if node_value is not None: |
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486 | node_value = ' '.join(node_value.split()) |
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487 | |
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488 | # If the value is a float, compile with units. |
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489 | if cs_values.ns_datatype == "float": |
---|
490 | # If an empty value is given, set as zero. |
---|
491 | if node_value is None or node_value.isspace() \ |
---|
492 | or node_value.lower() == "nan": |
---|
493 | node_value = "0.0" |
---|
494 | #Convert the value to the base units |
---|
495 | node_value, units = self._unit_conversion(node, \ |
---|
496 | cs_values.current_level, data1d, tagname, node_value) |
---|
497 | |
---|
498 | # If the value is a timestamp, convert to a datetime object |
---|
499 | elif cs_values.ns_datatype == "timestamp": |
---|
500 | if node_value is None or node_value.isspace(): |
---|
501 | pass |
---|
502 | else: |
---|
503 | try: |
---|
504 | node_value = \ |
---|
505 | datetime.datetime.fromtimestamp(node_value) |
---|
506 | except ValueError: |
---|
507 | node_value = None |
---|
508 | return node_value, units |
---|
509 | |
---|
510 | def _parse_entry(self, dom, names=None, data1d=None, extras=None): |
---|
511 | """ |
---|
512 | Parse a SASEntry - new recursive method for parsing the dom of |
---|
513 | the CanSAS data format. This will allow multiple data files |
---|
514 | and extra nodes to be read in simultaneously. |
---|
515 | |
---|
516 | :param dom: dom object with a namespace base of names |
---|
517 | :param names: A list of element names that lead up to the dom object |
---|
518 | :param data1d: The data1d object that will be modified |
---|
519 | :param extras: Any values that should go into meta_data when data1d |
---|
520 | is not a Data1D object |
---|
521 | """ |
---|
522 | |
---|
523 | if extras is None: |
---|
524 | extras = [] |
---|
525 | if names is None or names == []: |
---|
526 | names = ["SASentry"] |
---|
527 | |
---|
528 | data1d = self._check_for_empty_data(data1d) |
---|
529 | |
---|
530 | self.base_ns = "{0}{1}{2}".format("{", \ |
---|
531 | CANSAS_NS.get(self.cansas_version).get("ns"), "}") |
---|
532 | tagname = '' |
---|
533 | tagname_original = '' |
---|
534 | |
---|
535 | # Go through each child in the parent element |
---|
536 | for node in dom: |
---|
537 | try: |
---|
538 | # Get the element name and set the current names level |
---|
539 | tagname = node.tag.replace(self.base_ns, "") |
---|
540 | tagname_original = tagname |
---|
541 | if tagname == "fitting_plug_in" or tagname == "pr_inversion" or\ |
---|
542 | tagname == "invariant": |
---|
543 | continue |
---|
544 | names.append(tagname) |
---|
545 | children = node.getchildren() |
---|
546 | if len(children) == 0: |
---|
547 | children = None |
---|
548 | save_data1d = data1d |
---|
549 | |
---|
550 | # Look for special cases |
---|
551 | data1d = self._handle_special_cases(tagname, data1d, children) |
---|
552 | |
---|
553 | # Get where to store content |
---|
554 | cs_values = CONSTANTS.iterate_namespace(names) |
---|
555 | # If the element is a child element, recurse |
---|
556 | if children is not None: |
---|
557 | # Returned value is new Data1D object with all previous and |
---|
558 | # new values in it. |
---|
559 | data1d, extras = self._parse_entry(node, |
---|
560 | names, data1d, extras) |
---|
561 | |
---|
562 | #Get the information from the node |
---|
563 | node_value, _ = self._get_node_value(node, cs_values, \ |
---|
564 | data1d, tagname) |
---|
565 | |
---|
566 | # If appending to a dictionary (meta_data | run_name) |
---|
567 | # make sure the key is unique |
---|
568 | if cs_values.ns_variable == "{0}.meta_data[\"{2}\"] = \"{1}\"": |
---|
569 | # If we are within a Process, Detector, Collimation or |
---|
570 | # Aperture instance, pull out old data1d |
---|
571 | tagname = self._create_unique_key(data1d.meta_data, \ |
---|
572 | tagname, 0) |
---|
573 | if isinstance(data1d, Data1D) == False: |
---|
574 | store_me = cs_values.ns_variable.format("data1d", \ |
---|
575 | node_value, tagname) |
---|
576 | extras.append(store_me) |
---|
577 | cs_values.ns_variable = None |
---|
578 | if cs_values.ns_variable == "{0}.run_name[\"{2}\"] = \"{1}\"": |
---|
579 | tagname = self._create_unique_key(data1d.run_name, \ |
---|
580 | tagname, 0) |
---|
581 | |
---|
582 | # Check for Data1D object and any extra commands to save |
---|
583 | if isinstance(data1d, Data1D): |
---|
584 | for item in extras: |
---|
585 | exec item |
---|
586 | # Don't bother saving empty information unless it is a float |
---|
587 | if cs_values.ns_variable is not None and \ |
---|
588 | node_value is not None and \ |
---|
589 | node_value.isspace() == False: |
---|
590 | # Format a string and then execute it. |
---|
591 | store_me = cs_values.ns_variable.format("data1d", \ |
---|
592 | node_value, tagname) |
---|
593 | exec store_me |
---|
594 | # Get attributes and process them |
---|
595 | data1d = self._handle_attributes(node, data1d, cs_values, \ |
---|
596 | tagname) |
---|
597 | |
---|
598 | except TypeError: |
---|
599 | pass |
---|
600 | except Exception as excep: |
---|
601 | exc_type, exc_obj, exc_tb = sys.exc_info() |
---|
602 | fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1] |
---|
603 | print(excep, exc_type, fname, exc_tb.tb_lineno, \ |
---|
604 | tagname, exc_obj) |
---|
605 | finally: |
---|
606 | # Save special cases in original data1d object |
---|
607 | # then restore the data1d |
---|
608 | save_data1d = self._restore_original_case(tagname_original, \ |
---|
609 | tagname, save_data1d, data1d) |
---|
610 | if tagname_original == "fitting_plug_in" or \ |
---|
611 | tagname_original == "invariant" or \ |
---|
612 | tagname_original == "pr_inversion": |
---|
613 | pass |
---|
614 | else: |
---|
615 | data1d = save_data1d |
---|
616 | # Remove tagname from names to restore original base |
---|
617 | names.remove(tagname_original) |
---|
618 | return data1d, extras |
---|
619 | |
---|
620 | def _get_pi_string(self): |
---|
621 | """ |
---|
622 | Creates the processing instructions header for writing to file |
---|
623 | """ |
---|
624 | pis = self.return_processing_instructions() |
---|
625 | if len(pis) > 0: |
---|
626 | pi_tree = self.create_tree(pis[0]) |
---|
627 | i = 1 |
---|
628 | for i in range(1, len(pis) - 1): |
---|
629 | pi_tree = self.append(pis[i], pi_tree) |
---|
630 | pi_string = self.to_string(pi_tree) |
---|
631 | else: |
---|
632 | pi_string = "" |
---|
633 | return pi_string |
---|
634 | |
---|
635 | def _create_main_node(self): |
---|
636 | """ |
---|
637 | Creates the primary xml header used when writing to file |
---|
638 | """ |
---|
639 | xsi = "http://www.w3.org/2001/XMLSchema-instance" |
---|
640 | version = self.cansas_version |
---|
641 | n_s = CANSAS_NS.get(version).get("ns") |
---|
642 | if version == "1.1": |
---|
643 | url = "http://www.cansas.org/formats/1.1/" |
---|
644 | else: |
---|
645 | url = "http://svn.smallangles.net/svn/canSAS/1dwg/trunk/" |
---|
646 | schema_location = "{0} {1}cansas1d.xsd".format(n_s, url) |
---|
647 | attrib = {"{" + xsi + "}schemaLocation" : schema_location, |
---|
648 | "version" : version} |
---|
649 | nsmap = {'xsi' : xsi, None: n_s} |
---|
650 | |
---|
651 | main_node = self.create_element("{" + n_s + "}SASroot", |
---|
652 | attrib=attrib, nsmap=nsmap) |
---|
653 | return main_node |
---|
654 | |
---|
655 | def _write_run_names(self, datainfo, entry_node): |
---|
656 | """ |
---|
657 | Writes the run names to the XML file |
---|
658 | |
---|
659 | :param datainfo: The Data1D object the information is coming from |
---|
660 | :param entry_node: lxml node ElementTree object to be appended to |
---|
661 | """ |
---|
662 | if datainfo.run == None or datainfo.run == []: |
---|
663 | datainfo.run.append(RUN_NAME_DEFAULT) |
---|
664 | datainfo.run_name[RUN_NAME_DEFAULT] = RUN_NAME_DEFAULT |
---|
665 | for item in datainfo.run: |
---|
666 | runname = {} |
---|
667 | if item in datainfo.run_name and \ |
---|
668 | len(str(datainfo.run_name[item])) > 1: |
---|
669 | runname = {'name': datainfo.run_name[item]} |
---|
670 | self.write_node(entry_node, "Run", item, runname) |
---|
671 | |
---|
672 | def _write_data(self, datainfo, entry_node): |
---|
673 | """ |
---|
674 | Writes the I and Q data to the XML file |
---|
675 | |
---|
676 | :param datainfo: The Data1D object the information is coming from |
---|
677 | :param entry_node: lxml node ElementTree object to be appended to |
---|
678 | """ |
---|
679 | node = self.create_element("SASdata") |
---|
680 | self.append(node, entry_node) |
---|
681 | |
---|
682 | for i in range(len(datainfo.x)): |
---|
683 | point = self.create_element("Idata") |
---|
684 | node.append(point) |
---|
685 | self.write_node(point, "Q", datainfo.x[i], |
---|
686 | {'unit': datainfo.x_unit}) |
---|
687 | if len(datainfo.y) >= i: |
---|
688 | self.write_node(point, "I", datainfo.y[i], |
---|
689 | {'unit': datainfo.y_unit}) |
---|
690 | if datainfo.dy != None and len(datainfo.dy) > i: |
---|
691 | self.write_node(point, "Idev", datainfo.dy[i], |
---|
692 | {'unit': datainfo.y_unit}) |
---|
693 | if datainfo.dx != None and len(datainfo.dx) > i: |
---|
694 | self.write_node(point, "Qdev", datainfo.dx[i], |
---|
695 | {'unit': datainfo.x_unit}) |
---|
696 | if datainfo.dxw != None and len(datainfo.dxw) > i: |
---|
697 | self.write_node(point, "dQw", datainfo.dxw[i], |
---|
698 | {'unit': datainfo.x_unit}) |
---|
699 | if datainfo.dxl != None and len(datainfo.dxl) > i: |
---|
700 | self.write_node(point, "dQl", datainfo.dxl[i], |
---|
701 | {'unit': datainfo.x_unit}) |
---|
702 | |
---|
703 | def _write_trans_spectrum(self, datainfo, entry_node): |
---|
704 | """ |
---|
705 | Writes the transmission spectrum data to the XML file |
---|
706 | |
---|
707 | :param datainfo: The Data1D object the information is coming from |
---|
708 | :param entry_node: lxml node ElementTree object to be appended to |
---|
709 | """ |
---|
710 | for i in range(len(datainfo.trans_spectrum)): |
---|
711 | spectrum = datainfo.trans_spectrum[i] |
---|
712 | node = self.create_element("SAStransmission_spectrum", |
---|
713 | {"name" : spectrum.name}) |
---|
714 | self.append(node, entry_node) |
---|
715 | if isinstance(spectrum.timestamp, datetime.datetime): |
---|
716 | node.setAttribute("timestamp", spectrum.timestamp) |
---|
717 | for i in range(len(spectrum.wavelength)): |
---|
718 | point = self.create_element("Tdata") |
---|
719 | node.append(point) |
---|
720 | self.write_node(point, "Lambda", spectrum.wavelength[i], |
---|
721 | {'unit': spectrum.wavelength_unit}) |
---|
722 | self.write_node(point, "T", spectrum.transmission[i], |
---|
723 | {'unit': spectrum.transmission_unit}) |
---|
724 | if spectrum.transmission_deviation != None \ |
---|
725 | and len(spectrum.transmission_deviation) >= i: |
---|
726 | self.write_node(point, "Tdev", |
---|
727 | spectrum.transmission_deviation[i], |
---|
728 | {'unit': |
---|
729 | spectrum.transmission_deviation_unit}) |
---|
730 | |
---|
731 | def _write_sample_info(self, datainfo, entry_node): |
---|
732 | """ |
---|
733 | Writes the sample information to the XML file |
---|
734 | |
---|
735 | :param datainfo: The Data1D object the information is coming from |
---|
736 | :param entry_node: lxml node ElementTree object to be appended to |
---|
737 | """ |
---|
738 | sample = self.create_element("SASsample") |
---|
739 | if datainfo.sample.name is not None: |
---|
740 | self.write_attribute(sample, "name", |
---|
741 | str(datainfo.sample.name)) |
---|
742 | self.append(sample, entry_node) |
---|
743 | self.write_node(sample, "ID", str(datainfo.sample.ID)) |
---|
744 | self.write_node(sample, "thickness", datainfo.sample.thickness, |
---|
745 | {"unit": datainfo.sample.thickness_unit}) |
---|
746 | self.write_node(sample, "transmission", datainfo.sample.transmission) |
---|
747 | self.write_node(sample, "temperature", datainfo.sample.temperature, |
---|
748 | {"unit": datainfo.sample.temperature_unit}) |
---|
749 | |
---|
750 | pos = self.create_element("position") |
---|
751 | written = self.write_node(pos, |
---|
752 | "x", |
---|
753 | datainfo.sample.position.x, |
---|
754 | {"unit": datainfo.sample.position_unit}) |
---|
755 | written = written | self.write_node( \ |
---|
756 | pos, "y", datainfo.sample.position.y, |
---|
757 | {"unit": datainfo.sample.position_unit}) |
---|
758 | written = written | self.write_node( \ |
---|
759 | pos, "z", datainfo.sample.position.z, |
---|
760 | {"unit": datainfo.sample.position_unit}) |
---|
761 | if written == True: |
---|
762 | self.append(pos, sample) |
---|
763 | |
---|
764 | ori = self.create_element("orientation") |
---|
765 | written = self.write_node(ori, "roll", |
---|
766 | datainfo.sample.orientation.x, |
---|
767 | {"unit": datainfo.sample.orientation_unit}) |
---|
768 | written = written | self.write_node( \ |
---|
769 | ori, "pitch", datainfo.sample.orientation.y, |
---|
770 | {"unit": datainfo.sample.orientation_unit}) |
---|
771 | written = written | self.write_node( \ |
---|
772 | ori, "yaw", datainfo.sample.orientation.z, |
---|
773 | {"unit": datainfo.sample.orientation_unit}) |
---|
774 | if written == True: |
---|
775 | self.append(ori, sample) |
---|
776 | |
---|
777 | for item in datainfo.sample.details: |
---|
778 | self.write_node(sample, "details", item) |
---|
779 | |
---|
780 | def _write_instrument(self, datainfo, entry_node): |
---|
781 | """ |
---|
782 | Writes the instrumental information to the XML file |
---|
783 | |
---|
784 | :param datainfo: The Data1D object the information is coming from |
---|
785 | :param entry_node: lxml node ElementTree object to be appended to |
---|
786 | """ |
---|
787 | instr = self.create_element("SASinstrument") |
---|
788 | self.append(instr, entry_node) |
---|
789 | self.write_node(instr, "name", datainfo.instrument) |
---|
790 | return instr |
---|
791 | |
---|
792 | def _write_source(self, datainfo, instr): |
---|
793 | """ |
---|
794 | Writes the source information to the XML file |
---|
795 | |
---|
796 | :param datainfo: The Data1D object the information is coming from |
---|
797 | :param instr: instrument node to be appended to |
---|
798 | """ |
---|
799 | source = self.create_element("SASsource") |
---|
800 | if datainfo.source.name is not None: |
---|
801 | self.write_attribute(source, "name", |
---|
802 | str(datainfo.source.name)) |
---|
803 | self.append(source, instr) |
---|
804 | if datainfo.source.radiation == None or datainfo.source.radiation == '': |
---|
805 | datainfo.source.radiation = "neutron" |
---|
806 | self.write_node(source, "radiation", datainfo.source.radiation) |
---|
807 | |
---|
808 | size = self.create_element("beam_size") |
---|
809 | if datainfo.source.beam_size_name is not None: |
---|
810 | self.write_attribute(size, "name", |
---|
811 | str(datainfo.source.beam_size_name)) |
---|
812 | written = self.write_node( \ |
---|
813 | size, "x", datainfo.source.beam_size.x, |
---|
814 | {"unit": datainfo.source.beam_size_unit}) |
---|
815 | written = written | self.write_node( \ |
---|
816 | size, "y", datainfo.source.beam_size.y, |
---|
817 | {"unit": datainfo.source.beam_size_unit}) |
---|
818 | written = written | self.write_node( \ |
---|
819 | size, "z", datainfo.source.beam_size.z, |
---|
820 | {"unit": datainfo.source.beam_size_unit}) |
---|
821 | if written == True: |
---|
822 | self.append(size, source) |
---|
823 | |
---|
824 | self.write_node(source, "beam_shape", datainfo.source.beam_shape) |
---|
825 | self.write_node(source, "wavelength", |
---|
826 | datainfo.source.wavelength, |
---|
827 | {"unit": datainfo.source.wavelength_unit}) |
---|
828 | self.write_node(source, "wavelength_min", |
---|
829 | datainfo.source.wavelength_min, |
---|
830 | {"unit": datainfo.source.wavelength_min_unit}) |
---|
831 | self.write_node(source, "wavelength_max", |
---|
832 | datainfo.source.wavelength_max, |
---|
833 | {"unit": datainfo.source.wavelength_max_unit}) |
---|
834 | self.write_node(source, "wavelength_spread", |
---|
835 | datainfo.source.wavelength_spread, |
---|
836 | {"unit": datainfo.source.wavelength_spread_unit}) |
---|
837 | |
---|
838 | def _write_collimation(self, datainfo, instr): |
---|
839 | """ |
---|
840 | Writes the collimation information to the XML file |
---|
841 | |
---|
842 | :param datainfo: The Data1D object the information is coming from |
---|
843 | :param instr: lxml node ElementTree object to be appended to |
---|
844 | """ |
---|
845 | if datainfo.collimation == [] or datainfo.collimation == None: |
---|
846 | coll = Collimation() |
---|
847 | datainfo.collimation.append(coll) |
---|
848 | for item in datainfo.collimation: |
---|
849 | coll = self.create_element("SAScollimation") |
---|
850 | if item.name is not None: |
---|
851 | self.write_attribute(coll, "name", str(item.name)) |
---|
852 | self.append(coll, instr) |
---|
853 | |
---|
854 | self.write_node(coll, "length", item.length, |
---|
855 | {"unit": item.length_unit}) |
---|
856 | |
---|
857 | for aperture in item.aperture: |
---|
858 | apert = self.create_element("aperture") |
---|
859 | if aperture.name is not None: |
---|
860 | self.write_attribute(apert, "name", str(aperture.name)) |
---|
861 | if aperture.type is not None: |
---|
862 | self.write_attribute(apert, "type", str(aperture.type)) |
---|
863 | self.append(apert, coll) |
---|
864 | |
---|
865 | size = self.create_element("size") |
---|
866 | if aperture.size_name is not None: |
---|
867 | self.write_attribute(size, "name", |
---|
868 | str(aperture.size_name)) |
---|
869 | written = self.write_node(size, "x", aperture.size.x, |
---|
870 | {"unit": aperture.size_unit}) |
---|
871 | written = written | self.write_node( \ |
---|
872 | size, "y", aperture.size.y, |
---|
873 | {"unit": aperture.size_unit}) |
---|
874 | written = written | self.write_node( \ |
---|
875 | size, "z", aperture.size.z, |
---|
876 | {"unit": aperture.size_unit}) |
---|
877 | if written == True: |
---|
878 | self.append(size, apert) |
---|
879 | |
---|
880 | self.write_node(apert, "distance", aperture.distance, |
---|
881 | {"unit": aperture.distance_unit}) |
---|
882 | |
---|
883 | def _write_detectors(self, datainfo, instr): |
---|
884 | """ |
---|
885 | Writes the detector information to the XML file |
---|
886 | |
---|
887 | :param datainfo: The Data1D object the information is coming from |
---|
888 | :param inst: lxml instrument node to be appended to |
---|
889 | """ |
---|
890 | if datainfo.detector == None or datainfo.detector == []: |
---|
891 | det = Detector() |
---|
892 | det.name = "" |
---|
893 | datainfo.detector.append(det) |
---|
894 | |
---|
895 | for item in datainfo.detector: |
---|
896 | det = self.create_element("SASdetector") |
---|
897 | written = self.write_node(det, "name", item.name) |
---|
898 | written = written | self.write_node(det, "SDD", item.distance, |
---|
899 | {"unit": item.distance_unit}) |
---|
900 | if written == True: |
---|
901 | self.append(det, instr) |
---|
902 | |
---|
903 | off = self.create_element("offset") |
---|
904 | written = self.write_node(off, "x", item.offset.x, |
---|
905 | {"unit": item.offset_unit}) |
---|
906 | written = written | self.write_node(off, "y", item.offset.y, |
---|
907 | {"unit": item.offset_unit}) |
---|
908 | written = written | self.write_node(off, "z", item.offset.z, |
---|
909 | {"unit": item.offset_unit}) |
---|
910 | if written == True: |
---|
911 | self.append(off, det) |
---|
912 | |
---|
913 | ori = self.create_element("orientation") |
---|
914 | written = self.write_node(ori, "roll", item.orientation.x, |
---|
915 | {"unit": item.orientation_unit}) |
---|
916 | written = written | self.write_node(ori, "pitch", |
---|
917 | item.orientation.y, |
---|
918 | {"unit": item.orientation_unit}) |
---|
919 | written = written | self.write_node(ori, "yaw", |
---|
920 | item.orientation.z, |
---|
921 | {"unit": item.orientation_unit}) |
---|
922 | if written == True: |
---|
923 | self.append(ori, det) |
---|
924 | |
---|
925 | center = self.create_element("beam_center") |
---|
926 | written = self.write_node(center, "x", item.beam_center.x, |
---|
927 | {"unit": item.beam_center_unit}) |
---|
928 | written = written | self.write_node(center, "y", |
---|
929 | item.beam_center.y, |
---|
930 | {"unit": item.beam_center_unit}) |
---|
931 | written = written | self.write_node(center, "z", |
---|
932 | item.beam_center.z, |
---|
933 | {"unit": item.beam_center_unit}) |
---|
934 | if written == True: |
---|
935 | self.append(center, det) |
---|
936 | |
---|
937 | pix = self.create_element("pixel_size") |
---|
938 | written = self.write_node(pix, "x", item.pixel_size.x, |
---|
939 | {"unit": item.pixel_size_unit}) |
---|
940 | written = written | self.write_node(pix, "y", item.pixel_size.y, |
---|
941 | {"unit": item.pixel_size_unit}) |
---|
942 | written = written | self.write_node(pix, "z", item.pixel_size.z, |
---|
943 | {"unit": item.pixel_size_unit}) |
---|
944 | written = written | self.write_node(det, "slit_length", |
---|
945 | item.slit_length, |
---|
946 | {"unit": item.slit_length_unit}) |
---|
947 | if written == True: |
---|
948 | self.append(pix, det) |
---|
949 | |
---|
950 | def _write_process_notes(self, datainfo, entry_node): |
---|
951 | """ |
---|
952 | Writes the process notes to the XML file |
---|
953 | |
---|
954 | :param datainfo: The Data1D object the information is coming from |
---|
955 | :param entry_node: lxml node ElementTree object to be appended to |
---|
956 | |
---|
957 | """ |
---|
958 | for item in datainfo.process: |
---|
959 | node = self.create_element("SASprocess") |
---|
960 | self.append(node, entry_node) |
---|
961 | self.write_node(node, "name", item.name) |
---|
962 | self.write_node(node, "date", item.date) |
---|
963 | self.write_node(node, "description", item.description) |
---|
964 | for term in item.term: |
---|
965 | value = term['value'] |
---|
966 | del term['value'] |
---|
967 | self.write_node(node, "term", value, term) |
---|
968 | for note in item.notes: |
---|
969 | self.write_node(node, "SASprocessnote", note) |
---|
970 | if len(item.notes) == 0: |
---|
971 | self.write_node(node, "SASprocessnote", "") |
---|
972 | |
---|
973 | def _write_notes(self, datainfo, entry_node): |
---|
974 | """ |
---|
975 | Writes the notes to the XML file and creates an empty note if none |
---|
976 | exist |
---|
977 | |
---|
978 | :param datainfo: The Data1D object the information is coming from |
---|
979 | :param entry_node: lxml node ElementTree object to be appended to |
---|
980 | |
---|
981 | """ |
---|
982 | if len(datainfo.notes) == 0: |
---|
983 | node = self.create_element("SASnote") |
---|
984 | self.append(node, entry_node) |
---|
985 | else: |
---|
986 | for item in datainfo.notes: |
---|
987 | node = self.create_element("SASnote") |
---|
988 | self.write_text(node, item) |
---|
989 | self.append(node, entry_node) |
---|
990 | |
---|
991 | def _check_origin(self, entry_node, doc, frm): |
---|
992 | """ |
---|
993 | Return the document, and the SASentry node associated with |
---|
994 | the data we just wrote. |
---|
995 | If the calling function was not the cansas reader, return a minidom |
---|
996 | object rather than an lxml object. |
---|
997 | |
---|
998 | :param entry_node: lxml node ElementTree object to be appended to |
---|
999 | :param doc: entire xml tree |
---|
1000 | """ |
---|
1001 | if not frm: |
---|
1002 | frm = inspect.stack()[1] |
---|
1003 | mod_name = frm[1].replace("\\", "/").replace(".pyc", "") |
---|
1004 | mod_name = mod_name.replace(".py", "") |
---|
1005 | mod = mod_name.split("sas/") |
---|
1006 | mod_name = mod[1] |
---|
1007 | if mod_name != "dataloader/readers/cansas_reader": |
---|
1008 | string = self.to_string(doc, pretty_print=False) |
---|
1009 | doc = parseString(string) |
---|
1010 | node_name = entry_node.tag |
---|
1011 | node_list = doc.getElementsByTagName(node_name) |
---|
1012 | entry_node = node_list.item(0) |
---|
1013 | return doc, entry_node |
---|
1014 | |
---|
1015 | def _to_xml_doc(self, datainfo): |
---|
1016 | """ |
---|
1017 | Create an XML document to contain the content of a Data1D |
---|
1018 | |
---|
1019 | :param datainfo: Data1D object |
---|
1020 | """ |
---|
1021 | if not issubclass(datainfo.__class__, Data1D): |
---|
1022 | raise RuntimeError, "The cansas writer expects a Data1D instance" |
---|
1023 | |
---|
1024 | # Get PIs and create root element |
---|
1025 | pi_string = self._get_pi_string() |
---|
1026 | # Define namespaces and create SASroot object |
---|
1027 | main_node = self._create_main_node() |
---|
1028 | # Create ElementTree, append SASroot and apply processing instructions |
---|
1029 | base_string = pi_string + self.to_string(main_node) |
---|
1030 | base_element = self.create_element_from_string(base_string) |
---|
1031 | doc = self.create_tree(base_element) |
---|
1032 | # Create SASentry Element |
---|
1033 | entry_node = self.create_element("SASentry") |
---|
1034 | root = doc.getroot() |
---|
1035 | root.append(entry_node) |
---|
1036 | |
---|
1037 | # Add Title to SASentry |
---|
1038 | self.write_node(entry_node, "Title", datainfo.title) |
---|
1039 | # Add Run to SASentry |
---|
1040 | self._write_run_names(datainfo, entry_node) |
---|
1041 | # Add Data info to SASEntry |
---|
1042 | self._write_data(datainfo, entry_node) |
---|
1043 | # Transmission Spectrum Info |
---|
1044 | self._write_trans_spectrum(datainfo, entry_node) |
---|
1045 | # Sample info |
---|
1046 | self._write_sample_info(datainfo, entry_node) |
---|
1047 | # Instrument info |
---|
1048 | instr = self._write_instrument(datainfo, entry_node) |
---|
1049 | # Source |
---|
1050 | self._write_source(datainfo, instr) |
---|
1051 | # Collimation |
---|
1052 | self._write_collimation(datainfo, instr) |
---|
1053 | # Detectors |
---|
1054 | self._write_detectors(datainfo, instr) |
---|
1055 | # Processes info |
---|
1056 | self._write_process_notes(datainfo, entry_node) |
---|
1057 | # Note info |
---|
1058 | self._write_notes(datainfo, entry_node) |
---|
1059 | # Return the document, and the SASentry node associated with |
---|
1060 | # the data we just wrote |
---|
1061 | # If the calling function was not the cansas reader, return a minidom |
---|
1062 | # object rather than an lxml object. |
---|
1063 | frm = inspect.stack()[1] |
---|
1064 | doc, entry_node = self._check_origin(entry_node, doc, frm) |
---|
1065 | return doc, entry_node |
---|
1066 | |
---|
1067 | def write_node(self, parent, name, value, attr=None): |
---|
1068 | """ |
---|
1069 | :param doc: document DOM |
---|
1070 | :param parent: parent node |
---|
1071 | :param name: tag of the element |
---|
1072 | :param value: value of the child text node |
---|
1073 | :param attr: attribute dictionary |
---|
1074 | |
---|
1075 | :return: True if something was appended, otherwise False |
---|
1076 | """ |
---|
1077 | if value is not None: |
---|
1078 | parent = self.ebuilder(parent, name, value, attr) |
---|
1079 | return True |
---|
1080 | return False |
---|
1081 | |
---|
1082 | def write(self, filename, datainfo): |
---|
1083 | """ |
---|
1084 | Write the content of a Data1D as a CanSAS XML file |
---|
1085 | |
---|
1086 | :param filename: name of the file to write |
---|
1087 | :param datainfo: Data1D object |
---|
1088 | """ |
---|
1089 | # Create XML document |
---|
1090 | doc, _ = self._to_xml_doc(datainfo) |
---|
1091 | # Write the file |
---|
1092 | file_ref = open(filename, 'w') |
---|
1093 | if self.encoding == None: |
---|
1094 | self.encoding = "UTF-8" |
---|
1095 | doc.write(file_ref, encoding=self.encoding, |
---|
1096 | pretty_print=True, xml_declaration=True) |
---|
1097 | file_ref.close() |
---|
1098 | |
---|
1099 | # DO NOT REMOVE - used in saving and loading panel states. |
---|
1100 | def _store_float(self, location, node, variable, storage, optional=True): |
---|
1101 | """ |
---|
1102 | Get the content of a xpath location and store |
---|
1103 | the result. Check that the units are compatible |
---|
1104 | with the destination. The value is expected to |
---|
1105 | be a float. |
---|
1106 | |
---|
1107 | The xpath location might or might not exist. |
---|
1108 | If it does not exist, nothing is done |
---|
1109 | |
---|
1110 | :param location: xpath location to fetch |
---|
1111 | :param node: node to read the data from |
---|
1112 | :param variable: name of the data member to store it in [string] |
---|
1113 | :param storage: data object that has the 'variable' data member |
---|
1114 | :param optional: if True, no exception will be raised |
---|
1115 | if unit conversion can't be done |
---|
1116 | |
---|
1117 | :raise ValueError: raised when the units are not recognized |
---|
1118 | """ |
---|
1119 | entry = get_content(location, node) |
---|
1120 | try: |
---|
1121 | value = float(entry.text) |
---|
1122 | except: |
---|
1123 | value = None |
---|
1124 | |
---|
1125 | if value is not None: |
---|
1126 | # If the entry has units, check to see that they are |
---|
1127 | # compatible with what we currently have in the data object |
---|
1128 | units = entry.get('unit') |
---|
1129 | if units is not None: |
---|
1130 | toks = variable.split('.') |
---|
1131 | local_unit = None |
---|
1132 | exec "local_unit = storage.%s_unit" % toks[0] |
---|
1133 | if local_unit != None and units.lower() != local_unit.lower(): |
---|
1134 | if HAS_CONVERTER == True: |
---|
1135 | try: |
---|
1136 | conv = Converter(units) |
---|
1137 | exec "storage.%s = %g" % \ |
---|
1138 | (variable, conv(value, units=local_unit)) |
---|
1139 | except: |
---|
1140 | _, exc_value, _ = sys.exc_info() |
---|
1141 | err_mess = "CanSAS reader: could not convert" |
---|
1142 | err_mess += " %s unit [%s]; expecting [%s]\n %s" \ |
---|
1143 | % (variable, units, local_unit, exc_value) |
---|
1144 | self.errors.add(err_mess) |
---|
1145 | if optional: |
---|
1146 | logging.info(err_mess) |
---|
1147 | else: |
---|
1148 | raise ValueError, err_mess |
---|
1149 | else: |
---|
1150 | err_mess = "CanSAS reader: unrecognized %s unit [%s];"\ |
---|
1151 | % (variable, units) |
---|
1152 | err_mess += " expecting [%s]" % local_unit |
---|
1153 | self.errors.add(err_mess) |
---|
1154 | if optional: |
---|
1155 | logging.info(err_mess) |
---|
1156 | else: |
---|
1157 | raise ValueError, err_mess |
---|
1158 | else: |
---|
1159 | exec "storage.%s = value" % variable |
---|
1160 | else: |
---|
1161 | exec "storage.%s = value" % variable |
---|
1162 | |
---|
1163 | # DO NOT REMOVE - used in saving and loading panel states. |
---|
1164 | def _store_content(self, location, node, variable, storage): |
---|
1165 | """ |
---|
1166 | Get the content of a xpath location and store |
---|
1167 | the result. The value is treated as a string. |
---|
1168 | |
---|
1169 | The xpath location might or might not exist. |
---|
1170 | If it does not exist, nothing is done |
---|
1171 | |
---|
1172 | :param location: xpath location to fetch |
---|
1173 | :param node: node to read the data from |
---|
1174 | :param variable: name of the data member to store it in [string] |
---|
1175 | :param storage: data object that has the 'variable' data member |
---|
1176 | |
---|
1177 | :return: return a list of errors |
---|
1178 | """ |
---|
1179 | entry = get_content(location, node) |
---|
1180 | if entry is not None and entry.text is not None: |
---|
1181 | exec "storage.%s = entry.text.strip()" % variable |
---|