| 1 | # class Loader to load any king of file |
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| 2 | import wx |
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| 3 | import string,numpy |
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| 4 | import logging |
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| 5 | class Reader: |
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| 6 | """ |
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| 7 | This class is loading values from given file or value giving by the user |
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| 8 | """ |
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| 9 | ext=['.txt','.dat'] |
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| 10 | def _init_(self,filename=None,x=None,y=None,dx=None,dy=None): |
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| 11 | # variable to store loaded values |
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| 12 | self.x = x |
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| 13 | self.y = y |
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| 14 | self.dx = dx |
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| 15 | self.dy = dy |
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| 16 | self.filename = filename |
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| 17 | |
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| 18 | |
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| 19 | def read(self,path, format=None): |
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| 20 | """ Store the values loaded from file in local variables |
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| 21 | can read 3 columns of data |
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| 22 | """ |
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| 23 | |
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| 24 | if not path == None: |
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| 25 | read_it = False |
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| 26 | |
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| 27 | for item in self.ext: |
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| 28 | if path.lower().find(item)>=0: |
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| 29 | read_it = True |
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| 30 | #print "this is the flag",read_it, path.lower() |
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| 31 | if read_it==False: |
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| 32 | return None |
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| 33 | else: |
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| 34 | try: |
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| 35 | input_f = open(path,'r') |
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| 36 | except : |
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| 37 | raise RuntimeError,"TXT3_Reader cannot open %s"%(path) |
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| 38 | buff = input_f.read() |
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| 39 | lines = buff.split('\n') |
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| 40 | self.x=[] |
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| 41 | self.y=[] |
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| 42 | self.dx = [] |
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| 43 | self.dy=[] |
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| 44 | for line in lines: |
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| 45 | toks = line.split() |
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| 46 | try: |
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| 47 | x = float(toks[0]) |
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| 48 | y = float(toks[1]) |
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| 49 | dy = float(toks[2]) |
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| 50 | |
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| 51 | self.x.append(x) |
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| 52 | self.y.append(y) |
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| 53 | self.dy.append(dy) |
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| 54 | |
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| 55 | except: |
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| 56 | pass |
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| 57 | #print "READ ERROR", line |
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| 58 | |
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| 59 | self.dx = numpy.zeros(len(self.x)) |
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| 60 | # Sanity check |
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| 61 | if not len(self.x) == len(self.dx): |
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| 62 | raise ValueError, "x and dx have different length" |
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| 63 | if not len(self.y) == len(self.dy): |
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| 64 | raise ValueError, "y and dy have different length" |
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| 65 | |
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| 66 | if (self.x==[] or self.y==[])and (self.dy==[]): |
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| 67 | raise ValueError, "TXT3_Reader can't read %s"%path |
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| 68 | else: |
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| 69 | #msg="txtReader Reading:\n"+"this x :"+ str(self.x) +"\n"+"this y:"+str(self.y)+"\n"+"this dy :"+str(self.dy)+"\n" |
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| 70 | #return msg |
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| 71 | logging.info ("TXT3_Reader reading %s \n" %(path)) |
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| 72 | return self.x,self.y,self.dy |
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| 73 | |
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| 74 | return None |
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| 75 | if __name__ == "__main__": |
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| 76 | read= Reader() |
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| 77 | #read= Reader(filename="testdata_line.txt") |
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| 78 | print read.load("test.dat") |
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| 79 | |
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| 80 | |
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| 81 | |
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