invariant_state.py @ 8fa3fb8

ESS_GUIESS_GUI_DocsESS_GUI_batch_fittingESS_GUI_bumps_abstractionESS_GUI_iss1116ESS_GUI_iss879ESS_GUI_iss959ESS_GUI_openclESS_GUI_orderingESS_GUI_sync_sascalccostrafo411magnetic_scattrelease-4.1.1release-4.1.2release-4.2.2ticket-1009ticket-1094-headlessticket-1242-2d-resolutionticket-1243ticket-1249ticket885unittest-saveload

Last change on this file since 8fa3fb8 was db5294e, checked in by krzywon, 8 years ago
#795: Small fix to invariant to check for None type when loading values. Working toward loading rpa and coreshellellipsoid integration.
Property mode set to `100644`
File size: 30.8 KB

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1	"""
2	State class for the invariant UI
3	"""
4
5	# import time
6	import os
7	import sys
8	import logging
9	import copy
10	import sas.sascalc.dataloader
11	# from xml.dom.minidom import parse
12	from lxml import etree
13	from sas.sascalc.dataloader.readers.cansas_reader import Reader as CansasReader
14	from sas.sascalc.dataloader.readers.cansas_reader import get_content
15	from sas.sasgui.guiframe.utils import format_number
16	from sas.sasgui.guiframe.gui_style import GUIFRAME_ID
17	from sas.sasgui.guiframe.dataFitting import Data1D
18
19	INVNODE_NAME = 'invariant'
20	CANSAS_NS = "cansas1d/1.0"
21
22	# default state
23	DEFAULT_STATE = {'file': 'None',
24	'compute_num':0,
25	'state_num':0,
26	'is_time_machine':False,
27	'background_tcl':0.0,
28	'scale_tcl':1.0,
29	'contrast_tcl':1.0,
30	'porod_constant_tcl':'',
31	'npts_low_tcl':10,
32	'npts_high_tcl':10,
33	'power_high_tcl':4.0,
34	'power_low_tcl': 4.0,
35	'enable_high_cbox':False,
36	'enable_low_cbox':False,
37	'guinier': True,
38	'power_law_high': False,
39	'power_law_low': False,
40	'fit_enable_high': False,
41	'fit_enable_low': False,
42	'fix_enable_high':True,
43	'fix_enable_low':True,
44	'volume_tcl':'',
45	'volume_err_tcl':'',
46	'surface_tcl':'',
47	'surface_err_tcl':''}
48	# list of states: This list will be filled as panel
49	# init and the number of states increases
50	state_list = {}
51	bookmark_list = {}
52	# list of input parameters (will be filled up on panel init) used by __str__
53	input_list = {'background_tcl':0,
54	'scale_tcl':0,
55	'contrast_tcl':0,
56	'porod_constant_tcl':'',
57	'npts_low_tcl':0,
58	'npts_high_tcl':0,
59	'power_high_tcl':0,
60	'power_low_tcl': 0}
61	# list of output parameters (order sensitive) used by __str__
62	output_list = [["qstar_low", "Q* from low Q extrapolation [1/(cm*A)]"],
63	["qstar_low_err", "dQ* from low Q extrapolation"],
64	["qstar_low_percent", "Q* percent from low Q extrapolation"],
65	["qstar", "Q* from data [1/(cm*A)]"],
66	["qstar_err", "dQ* from data"],
67	["qstar_percent", "Q* percent from data"],
68	["qstar_high", "Q* from high Q extrapolation [1/(cm*A)]"],
69	["qstar_high_err", "dQ* from high Q extrapolation"],
70	["qstar_high_percent", "Q* percent from low Q extrapolation"],
71	["qstar_total", "total Q* [1/(cm*A)]"],
72	["qstar_total_err", "total dQ*"],
73	["volume", "volume fraction"],
74	["volume_err", "volume fraction error"],
75	["surface", "specific surface"],
76	["surface_err", "specific surface error"]]
77
78
79
80	class InvariantState(object):
81	"""
82	Class to hold the state information of the InversionControl panel.
83	"""
84	def __init__(self):
85	"""
86	Default values
87	"""
88	# Input
89	self.file = None
90	self.data = Data1D(x=[], y=[], dx=None, dy=None)
91	self.theory_lowQ = Data1D(x=[], y=[], dy=None)
92	self.theory_lowQ.symbol = GUIFRAME_ID.CURVE_SYMBOL_NUM
93	self.theory_highQ = Data1D(x=[], y=[], dy=None)
94	self.theory_highQ.symbol = GUIFRAME_ID.CURVE_SYMBOL_NUM
95	# self.is_time_machine = False
96	self.saved_state = DEFAULT_STATE
97	self.state_list = state_list
98	self.bookmark_list = bookmark_list
99	self.input_list = input_list
100	self.output_list = output_list
101
102	self.compute_num = 0
103	self.state_num = 0
104	self.timestamp = ('00:00:00', '00/00/0000')
105	self.container = None
106	# plot image
107	self.wximbmp = None
108	# report_html strings
109	import sas.sasgui.perspectives.invariant as invariant
110	path = invariant.get_data_path(media='media')
111	path_report_html = os.path.join(path, "report_template.html")
112	html_template = open(path_report_html, "r")
113	self.template_str = html_template.read()
114	self.report_str = self.template_str
115	# self.report_str_save = None
116	html_template.close()
117
118	def __str__(self):
119	"""
120	Pretty print
121
122	: return: string representing the state
123	"""
124	# Input string
125	compute_num = self.saved_state['compute_num']
126	compute_state = self.state_list[str(compute_num)]
127	my_time, date = self.timestamp
128	file_name = self.file
129
130	state_num = int(self.saved_state['state_num'])
131	state = "\n[Invariant computation for %s: " % file_name
132	state += "performed at %s on %s] \n" % (my_time, date)
133	state += "State No.: %d \n" % state_num
134	state += "\n=== Inputs ===\n"
135
136	# text ctl general inputs ( excluding extrapolation text ctl)
137	for key, value in self.input_list.iteritems():
138	if value == '':
139	continue
140	key_split = key.split('_')
141	max_ind = len(key_split) - 1
142	if key_split[max_ind] == 'tcl':
143	name = ""
144	if key_split[1] == 'low' or key_split[1] == 'high':
145	continue
146	for ind in range(0, max_ind):
147	name += " %s" % key_split[ind]
148	state += "%s: %s\n" % (name.lstrip(" "), value)
149
150	# other input parameters
151	extra_lo = compute_state['enable_low_cbox']
152	if compute_state['enable_low_cbox']:
153	if compute_state['guinier']:
154	extra_lo = 'Guinier'
155	else:
156	extra_lo = 'Power law'
157	extra_hi = compute_state['enable_high_cbox']
158	if compute_state['enable_high_cbox']:
159	extra_hi = 'Power law'
160	state += "\nExtrapolation: High=%s; Low=%s\n" % (extra_hi, extra_lo)
161	low_off = False
162	high_off = False
163	for key, value in self.input_list.iteritems():
164	key_split = key.split('_')
165	max_ind = len(key_split) - 1
166	if key_split[max_ind] == 'tcl':
167	name = ""
168	# check each buttons whether or not ON or OFF
169	if key_split[1] == 'low' or key_split[1] == 'high':
170	if not compute_state['enable_low_cbox'] and \
171	key_split[max_ind - 1] == 'low':
172	low_off = True
173	continue
174	elif not compute_state['enable_high_cbox'] and \
175	key_split[max_ind - 1] == 'high':
176	high_off = True
177	continue
178	elif extra_lo == 'Guinier' and key_split[0] == 'power' and \
179	key_split[max_ind - 1] == 'low':
180	continue
181	for ind in range(0, max_ind):
182	name += " %s" % key_split[ind]
183	name = name.lstrip(" ")
184	if name == "power low":
185	if compute_state['fix_enable_low']:
186	name += ' (Fixed)'
187	else:
188	name += ' (Fitted)'
189	if name == "power high":
190	if compute_state['fix_enable_high']:
191	name += ' (Fixed)'
192	else:
193	name += ' (Fitted)'
194	state += "%s: %s\n" % (name, value)
195	# Outputs
196	state += "\n=== Outputs ==="
197	for item in output_list:
198	item_split = item[0].split('_')
199	# Exclude the extrapolation that turned off
200	if len(item_split) > 1:
201	if low_off and item_split[1] == 'low':
202	continue
203	if high_off and item_split[1] == 'high':
204	continue
205	max_ind = len(item_split) - 1
206	value = None
207	if hasattr(self.container, item[0]):
208	# Q* outputs
209	value = getattr(self.container, item[0])
210	else:
211	# other outputs than Q*
212	name = item[0] + "_tcl"
213	if name in self.saved_state.keys():
214	value = self.saved_state[name]
215
216	# Exclude the outputs w/''
217	if value == '':
218	continue
219	# Error outputs
220	if item_split[max_ind] == 'err':
221	state += "+- %s " % format_number(value)
222	# Percentage outputs
223	elif item_split[max_ind] == 'percent':
224	value = float(value) * 100
225	state += "(%s %s)" % (format_number(value), '%')
226	# Outputs
227	else:
228	state += "\n%s: %s " % (item[1],
229	format_number(value, high=True))
230	# Include warning msg
231	if self.container is not None:
232	state += "\n\nNote:\n" + self.container.warning_msg
233	return state
234
235	def clone_state(self):
236	"""
237	deepcopy the state
238	"""
239	return copy.deepcopy(self.saved_state)
240
241	def toXML(self, file="inv_state.inv", doc=None, entry_node=None):
242	"""
243	Writes the state of the InversionControl panel to file, as XML.
244
245	Compatible with standalone writing, or appending to an
246	already existing XML document. In that case, the XML document
247	is required. An optional entry node in the XML document
248	may also be given.
249
250	: param file: file to write to
251	: param doc: XML document object [optional]
252	: param entry_node: XML node within the document at which we will append the data [optional]
253	"""
254	# TODO: Get this to work
255	from xml.dom.minidom import getDOMImplementation
256	import time
257	timestamp = time.time()
258	# Check whether we have to write a standalone XML file
259	if doc is None:
260	impl = getDOMImplementation()
261
262	doc_type = impl.createDocumentType(INVNODE_NAME, "1.0", "1.0")
263
264	newdoc = impl.createDocument(None, INVNODE_NAME, doc_type)
265	top_element = newdoc.documentElement
266	else:
267	# We are appending to an existing document
268	newdoc = doc
269	top_element = newdoc.createElement(INVNODE_NAME)
270	if entry_node is None:
271	newdoc.documentElement.appendChild(top_element)
272	else:
273	entry_node.appendChild(top_element)
274
275	attr = newdoc.createAttribute("version")
276	attr.nodeValue = '1.0'
277	top_element.setAttributeNode(attr)
278
279	# File name
280	element = newdoc.createElement("filename")
281	if self.file != None and self.file != '':
282	element.appendChild(newdoc.createTextNode(str(self.file)))
283	else:
284	element.appendChild(newdoc.createTextNode(str(file)))
285	top_element.appendChild(element)
286
287	element = newdoc.createElement("timestamp")
288	element.appendChild(newdoc.createTextNode(time.ctime(timestamp)))
289	attr = newdoc.createAttribute("epoch")
290	attr.nodeValue = str(timestamp)
291	element.setAttributeNode(attr)
292	top_element.appendChild(element)
293
294	# Current state
295	state = newdoc.createElement("state")
296	top_element.appendChild(state)
297
298	for name, value in self.saved_state.iteritems():
299	element = newdoc.createElement(str(name))
300	element.appendChild(newdoc.createTextNode(str(value)))
301	state.appendChild(element)
302
303	# State history list
304	history = newdoc.createElement("history")
305	top_element.appendChild(history)
306
307	for name, value in self.state_list.iteritems():
308	history_element = newdoc.createElement('state_' + str(name))
309	for state_name, state_value in value.iteritems():
310	state_element = newdoc.createElement(str(state_name))
311	child = newdoc.createTextNode(str(state_value))
312	state_element.appendChild(child)
313	history_element.appendChild(state_element)
314	# history_element.appendChild(state_list_element)
315	history.appendChild(history_element)
316
317	# Bookmarks bookmark_list[self.bookmark_num] = [\
318	# my_time,date,state,comp_state]
319	bookmark = newdoc.createElement("bookmark")
320	top_element.appendChild(bookmark)
321	item_list = ['time', 'date', 'state', 'comp_state']
322	for name, value_list in self.bookmark_list.iteritems():
323	element = newdoc.createElement('mark_' + str(name))
324	_, date, state, comp_state = value_list
325	time_element = newdoc.createElement('time')
326	time_element.appendChild(newdoc.createTextNode(str(value_list[0])))
327	date_element = newdoc.createElement('date')
328	date_element.appendChild(newdoc.createTextNode(str(value_list[1])))
329	state_list_element = newdoc.createElement('state')
330	comp_state_list_element = newdoc.createElement('comp_state')
331	for state_name, state_value in value_list[2].iteritems():
332	state_element = newdoc.createElement(str(state_name))
333	child = newdoc.createTextNode(str(state_value))
334	state_element.appendChild(child)
335	state_list_element.appendChild(state_element)
336	for comp_name, comp_value in value_list[3].iteritems():
337	comp_element = newdoc.createElement(str(comp_name))
338	comp_element.appendChild(newdoc.createTextNode(str(comp_value)))
339	comp_state_list_element.appendChild(comp_element)
340	element.appendChild(time_element)
341	element.appendChild(date_element)
342	element.appendChild(state_list_element)
343	element.appendChild(comp_state_list_element)
344	bookmark.appendChild(element)
345
346	# Save the file
347	if doc is None:
348	fd = open('test000', 'w')
349	fd.write(newdoc.toprettyxml())
350	fd.close()
351	return None
352	else:
353	return newdoc
354
355	def fromXML(self, file=None, node=None):
356	"""
357	Load invariant states from a file
358
359	: param file: .inv file
360	: param node: node of a XML document to read from
361	"""
362	if file is not None:
363	msg = "InvariantSate no longer supports non-CanSAS"
364	msg += " format for invariant files"
365	raise RuntimeError, msg
366
367	if node.get('version')\
368	and node.get('version') == '1.0':
369
370	# Get file name
371	entry = get_content('ns:filename', node)
372	if entry is not None:
373	file_name = entry.text.strip()
374
375	# Get time stamp
376	entry = get_content('ns:timestamp', node)
377	if entry is not None and entry.get('epoch'):
378	try:
379	timestamp = (entry.get('epoch'))
380	except:
381	msg = "InvariantSate.fromXML: Could not read"
382	msg += " timestamp\n %s" % sys.exc_value
383	logging.error(msg)
384
385	# Parse bookmarks
386	entry_bookmark = get_content('ns:bookmark', node)
387
388	for ind in range(1, len(entry_bookmark) + 1):
389	temp_state = {}
390	temp_bookmark = {}
391	entry = get_content('ns:mark_%s' % ind, entry_bookmark)
392
393	if entry is not None:
394	my_time = get_content('ns:time', entry)
395	val_time = str(my_time.text.strip())
396	date = get_content('ns:date', entry)
397	val_date = str(date.text.strip())
398	state_entry = get_content('ns:state', entry)
399	for item in DEFAULT_STATE:
400	input_field = get_content('ns:%s' % item, state_entry)
401	val = str(input_field.text.strip())
402	if input_field is not None:
403	temp_state[item] = val
404	comp_entry = get_content('ns:comp_state', entry)
405
406	for item in DEFAULT_STATE:
407	input_field = get_content('ns:%s' % item, comp_entry)
408	val = str(input_field.text.strip())
409	if input_field is not None:
410	temp_bookmark[item] = val
411	try:
412	self.bookmark_list[ind] = [val_time, val_date, temp_state, temp_bookmark]
413	except:
414	raise "missing components of bookmarks..."
415	# Parse histories
416	entry_history = get_content('ns:history', node)
417
418	for ind in range(0, len(entry_history)):
419	temp_state = {}
420	entry = get_content('ns:state_%s' % ind, entry_history)
421
422	if entry is not None:
423	for item in DEFAULT_STATE:
424	input_field = get_content('ns:%s' % item, entry)
425	if input_field.text is not None:
426	val = str(input_field.text.strip())
427	else:
428	val = ''
429	if input_field is not None:
430	temp_state[item] = val
431	self.state_list[str(ind)] = temp_state
432
433	# Parse current state (ie, saved_state)
434	entry = get_content('ns:state', node)
435	if entry is not None:
436	for item in DEFAULT_STATE:
437	input_field = get_content('ns:%s' % item, entry)
438	if input_field.text is not None:
439	val = str(input_field.text.strip())
440	else:
441	val = ''
442	if input_field is not None:
443	self.set_saved_state(name=item, value=val)
444	self.file = file_name
445
446	def set_report_string(self):
447	"""
448	Get the values (strings) from __str__ for report
449	"""
450	strings = self.__str__()
451
452	# default string values
453	for num in range(1, 19):
454	exec "s_%s = 'NA'" % str(num)
455	lines = strings.split('\n')
456	# get all string values from __str__()
457	for line in range(0, len(lines)):
458	if line == 1:
459	s_1 = lines[1]
460	elif line == 2:
461	s_2 = lines[2]
462	else:
463	item = lines[line].split(':')
464	item[0] = item[0].strip()
465	if item[0] == "scale":
466	s_3 = item[1]
467	elif item[0] == "porod constant":
468	s_4 = item[1]
469	elif item[0] == "background":
470	s_5 = item[1]
471	elif item[0] == "contrast":
472	s_6 = item[1]
473	elif item[0] == "Extrapolation":
474	extra = item[1].split(";")
475	bool_0 = extra[0].split("=")
476	bool_1 = extra[1].split("=")
477	s_8 = " " + bool_0[0] + "Q region = " + bool_0[1]
478	s_7 = " " + bool_1[0] + "Q region = " + bool_1[1]
479	elif item[0] == "npts low":
480	s_9 = item[1]
481	elif item[0] == "npts high":
482	s_10 = item[1]
483	elif item[0] == "volume fraction":
484	val = item[1].split("+-")[0].strip()
485	error = item[1].split("+-")[1].strip()
486	s_17 = val + " ± " + error
487	elif item[0] == "specific surface":
488	val = item[1].split("+-")[0].strip()
489	error = item[1].split("+-")[1].strip()
490	s_18 = val + " ± " + error
491	elif item[0].split("(")[0].strip() == "power low":
492	s_11 = item[0] + " =" + item[1]
493	elif item[0].split("(")[0].strip() == "power high":
494	s_12 = item[0] + " =" + item[1]
495	elif item[0].split("[")[0].strip() == "Q* from low Q extrapolation":
496	# looks messy but this way the symbols +_ and % work on html
497	val = item[1].split("+-")[0].strip()
498	error = item[1].split("+-")[1].strip()
499	err = error.split("%")[0].strip()
500	percent = error.split("%")[1].strip()
501	s_13 = val + " ± " + err + "&#37" + percent
502	elif item[0].split("[")[0].strip() == "Q* from data":
503	val = item[1].split("+-")[0].strip()
504	error = item[1].split("+-")[1].strip()
505	err = error.split("%")[0].strip()
506	percent = error.split("%")[1].strip()
507	s_14 = val + " ± " + err + "&#37" + percent
508	elif item[0].split("[")[0].strip() == "Q* from high Q extrapolation":
509	val = item[1].split("+-")[0].strip()
510	error = item[1].split("+-")[1].strip()
511	err = error.split("%")[0].strip()
512	percent = error.split("%")[1].strip()
513	s_15 = val + " ± " + err + "&#37" + percent
514	elif item[0].split("[")[0].strip() == "total Q*":
515	val = item[1].split("+-")[0].strip()
516	error = item[1].split("+-")[1].strip()
517	s_16 = val + " ± " + error
518	else:
519	continue
520
521	s_1 = self._check_html_format(s_1)
522	file_name = self._check_html_format(self.file)
523
524	# make plot image
525	self.set_plot_state(extra_high=bool_0[1], extra_low=bool_1[1])
526	# get ready for report with setting all the html strings
527	self.report_str = str(self.template_str) % (s_1, s_2,
528	s_3, s_4, s_5, s_6, s_7, s_8,
529	s_9, s_10, s_11, s_12, s_13, s_14, s_15,
530	s_16, s_17, s_18, file_name, "%s")
531
532	def _check_html_format(self, name):
533	"""
534	Check string '%' for html format
535	"""
536	if name.count('%'):
537	name = name.replace('%', '&#37')
538
539	return name
540
541	def set_saved_state(self, name, value):
542	"""
543	Set the state list
544
545	: param name: name of the state component
546	: param value: value of the state component
547	"""
548	rb_list = [['power_law_low', 'guinier'],
549	['fit_enable_low', 'fix_enable_low'],
550	['fit_enable_high', 'fix_enable_high']]
551
552	self.name = value
553	self.saved_state[name] = value
554	# set the count part of radio button clicked
555	# False for the saved_state
556	for title, content in rb_list:
557	if name == title:
558	name = content
559	value = False
560	elif name == content:
561	name = title
562	value = False
563	self.saved_state[name] = value
564	self.state_num = self.saved_state['state_num']
565
566	def set_plot_state(self, extra_high=False, extra_low=False):
567	"""
568	Build image state that wx.html understand
569	by plotting, putting it into wx.FileSystem image object
570
571	: extrap_high,extra_low: low/high extrapolations
572	are possible extra-plots
573	"""
574	# some imports
575	import wx
576	import matplotlib.pyplot as plt
577	from matplotlib.backends.backend_agg import FigureCanvasAgg
578
579	# we use simple plot, not plotpanel
580	# make matlab figure
581	fig = plt.figure()
582	fig.set_facecolor('w')
583	graph = fig.add_subplot(111)
584
585	# data plot
586	graph.errorbar(self.data.x, self.data.y, yerr=self.data.dy, fmt='o')
587	# low Q extrapolation fit plot
588	if not extra_low == 'False':
589	graph.plot(self.theory_lowQ.x, self.theory_lowQ.y)
590	# high Q extrapolation fit plot
591	if not extra_high == 'False':
592	graph.plot(self.theory_highQ.x, self.theory_highQ.y)
593	graph.set_xscale("log", nonposx='clip')
594	graph.set_yscale("log", nonposy='clip')
595	graph.set_xlabel('$\\rm{Q}(\\AA^{-1})$', fontsize=12)
596	graph.set_ylabel('$\\rm{Intensity}(cm^{-1})$', fontsize=12)
597	canvas = FigureCanvasAgg(fig)
598	# actually make image
599	canvas.draw()
600
601	# make python.Image object
602	# size
603	w, h = canvas.get_width_height()
604	# convert to wx.Image
605	wximg = wx.EmptyImage(w, h)
606	# wxim.SetData(img.convert('RGB').tostring() )
607	wximg.SetData(canvas.tostring_rgb())
608	# get the dynamic image for the htmlwindow
609	wximgbmp = wx.BitmapFromImage(wximg)
610	# store the image in wx.FileSystem Object
611	wx.FileSystem.AddHandler(wx.MemoryFSHandler())
612	# use wx.MemoryFSHandler
613	self.imgRAM = wx.MemoryFSHandler()
614	# AddFile, image can be retrieved with 'memory:filename'
615	self.imgRAM.AddFile('img_inv.png', wximgbmp, wx.BITMAP_TYPE_PNG)
616
617	self.wximgbmp = 'memory:img_inv.png'
618	self.image = fig
619
620	class Reader(CansasReader):
621	"""
622	Class to load a .inv invariant file
623	"""
624	# # File type
625	type_name = "Invariant"
626
627	# # Wildcards
628	type = ["Invariant file (.inv)\|.inv",
629	"SASView file (.svs)\|.svs"]
630	# # List of allowed extensions
631	ext = ['.inv', '.INV', '.svs', 'SVS']
632
633	def __init__(self, call_back, cansas=True):
634	"""
635	Initialize the call-back method to be called
636	after we load a file
637
638	: param call_back: call-back method
639	: param cansas: True = files will be written/read in CanSAS format
640	False = write CanSAS format
641	"""
642	# # Call back method to be executed after a file is read
643	self.call_back = call_back
644	# # CanSAS format flag
645	self.cansas = cansas
646	self.state = None
647
648	def read(self, path):
649	"""
650	Load a new invariant state from file
651
652	: param path: file path
653	: return: None
654	"""
655	if self.cansas == True:
656	return self._read_cansas(path)
657	else:
658	return self._read_standalone(path)
659
660	def _read_standalone(self, path):
661	"""
662	Load a new invariant state from file.
663	The invariant node is assumed to be the top element.
664
665	: param path: file path
666	: return: None
667	"""
668	# Read the new state from file
669	state = InvariantState()
670
671	state.fromXML(file=path)
672
673	# Call back to post the new state
674	self.call_back(state)
675	return None
676
677	def _parse_state(self, entry):
678	"""
679	Read an invariant result from an XML node
680
681	: param entry: XML node to read from
682	: return: InvariantState object
683	"""
684	state = None
685	# Locate the invariant node
686	try:
687	nodes = entry.xpath('ns:%s' % INVNODE_NAME,
688	namespaces={'ns': CANSAS_NS})
689	# Create an empty state
690	if nodes != []:
691	state = InvariantState()
692	state.fromXML(node=nodes[0])
693	except:
694	msg = "XML document does not contain invariant"
695	msg += " information.\n %s" % sys.exc_value
696	logging.info(msg)
697	return state
698
699	def _read_cansas(self, path):
700	"""
701	Load data and invariant information from a CanSAS XML file.
702
703	: param path: file path
704	: return: Data1D object if a single SASentry was found,
705	or a list of Data1D objects if multiple entries were found,
706	or None of nothing was found
707	: raise RuntimeError: when the file can't be opened
708	: raise ValueError: when the length of the data vectors are inconsistent
709	"""
710	output = []
711	if os.path.isfile(path):
712	basename = os.path.basename(path)
713	root, extension = os.path.splitext(basename)
714
715	if extension.lower() in self.ext or \
716	extension.lower() == '.xml':
717	tree = etree.parse(path, parser=etree.ETCompatXMLParser())
718
719	# Check the format version number
720	# Specifying the namespace will take care of
721	# the file format version
722	root = tree.getroot()
723
724	entry_list = root.xpath('/ns:SASroot/ns:SASentry',
725	namespaces={'ns': CANSAS_NS})
726
727	for entry in entry_list:
728
729	sas_entry, _ = self._parse_entry(entry)
730	invstate = self._parse_state(entry)
731
732	# invstate could be None when .svs file is loaded
733	# in this case, skip appending to output
734	if invstate != None:
735	sas_entry.meta_data['invstate'] = invstate
736	sas_entry.filename = invstate.file
737	output.append(sas_entry)
738	else:
739	raise RuntimeError, "%s is not a file" % path
740
741	# Return output consistent with the loader's api
742	if len(output) == 0:
743	return None
744	elif len(output) == 1:
745	# Call back to post the new state
746	self.state = output[0].meta_data['invstate']
747	self.call_back(state=output[0].meta_data['invstate'],
748	datainfo=output[0])
749	return output[0]
750	else:
751	return output
752
753	def get_state(self):
754	return self.state
755
756	def write(self, filename, datainfo=None, invstate=None):
757	"""
758	Write the content of a Data1D as a CanSAS XML file
759
760	: param filename: name of the file to write
761	: param datainfo: Data1D object
762	: param invstate: InvariantState object
763	"""
764	# Sanity check
765	if self.cansas == True:
766	doc = self.write_toXML(datainfo, invstate)
767	# Write the XML document
768	fd = open(filename, 'w')
769	fd.write(doc.toprettyxml())
770	fd.close()
771	else:
772	invstate.toXML(file=filename)
773
774	def write_toXML(self, datainfo=None, state=None):
775	"""
776	Write toXML, a helper for write()
777
778	: return: xml doc
779	"""
780	if datainfo is None:
781	datainfo = sas.sascalc.dataloader.data_info.Data1D(x=[], y=[])
782	elif not issubclass(datainfo.__class__, sas.sascalc.dataloader.data_info.Data1D):
783	msg = "The cansas writer expects a Data1D"
784	msg += " instance: %s" % str(datainfo.__class__.__name__)
785	raise RuntimeError, msg
786	# make sure title and data run is filled up.
787	if datainfo.title == None or datainfo.title == '':
788	datainfo.title = datainfo.name
789	if datainfo.run_name == None or datainfo.run_name == {}:
790	datainfo.run = [str(datainfo.name)]
791	datainfo.run_name[0] = datainfo.name
792	# Create basic XML document
793	doc, sasentry = self._to_xml_doc(datainfo)
794	# Add the invariant information to the XML document
795	if state is not None:
796	doc = state.toXML(datainfo.name, doc=doc, entry_node=sasentry)
797	return doc

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SasView

source: sasview/src/sas/sasgui/perspectives/invariant/invariant_state.py @ 8fa3fb8

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