Wie erhalten Sie Wert von Tabelle Textdatei von Python?

Question

Ich versuche, Wert aus der Tabelle Textdatei zu erhalten.

filename = open('D:\THESIS\DATA\outputData\covarince.txt', 'r') 
for n in xrange(21): 
    next(filename) 

#for line in filename: 


for line in filename: 
    line = line.strip() 
    word = line.split() 
    print word [5:9] 

aber Ergebnis ....

['1.858598e+007', '1.771380e+007', '1.680333e+007', '3.094793e+007'] 
['1.755510e+007', '1.675123e+007', '1.592444e+007', '2.924262e+007'] 
['1.667081e+007', '1.593449e+007', '1.525907e+007', '2.744351e+007'] 
['3.140037e+007', '2.997102e+007', '2.821130e+007', '5.446339e+007'] 
['2.610668e+007', '2.504934e+007', '2.423942e+007', '4.068118e+007'] 
['2.504934e+007', '2.410118e+007', '2.337335e+007', '3.907932e+007'] 
['2.423942e+007', '2.337335e+007', '2.292371e+007', '3.696649e+007'] 
['4.068118e+007', '3.907932e+007', '3.696649e+007', '7.047854e+007'] 
[] 
[] 
[] 
[] 
[] 
['4', '5', '6', '7'] 
[] 
['0.83751', '0.83075', '0.80804', '0.84876'] 
['0.83533', '0.82958', '0.80864', '0.84687'] 
['0.82648', '0.82219', '0.80731', '0.82806'] 
['0.81225', '0.80689', '0.77877', '0.85745'] 
['1.00000', '0.99862', '0.99084', '0.94839'] 
['0.99862', '1.00000', '0.99440', '0.94820'] 
['0.99084', '0.99440', '1.00000', '0.91968'] 
['0.94839', '0.94820', '0.91968', '1.00000'] 
[] 

möchte ich nur Wert in gelb-Highlight:

Answer 1

Dies sollten Sie Sie

filepath = 'D:\THESIS\DATA\outputData\covarince.txt' 

field_offset = 5 # first element index to get 
nb_lines = 3 # number of lines we want 
line_index = 0 # current line 
with open(filepath, 'r') as f: 
    for line in f: 
     line = line.strip() 
     if line == '' or line.startswith('#'): 
      # ignore comments and empty lines 
      continue 
     if line_index >= nb_lines: 
      # stop when we got all lines we want 
      break 
     # list of elements in line 
     elements = line.split() 
     print elements[line_index + field_offset] 
     line_index += 1