python并行迭代

并行迭代：同时并行遍历两个列表

for line1,line2 in zip(line1_list, line2_list):

...

无聊，贴一段刚才的代码：

 import sys
 import string

 expected=""
 result=""

 if sys.argv[1] == '--help':
   print 'example: --expected=expected --result=result'
 if len(sys.argv) < 3:
   print 'please provide correct file path'
   sys.exit()

 index = 1
 while index < 3:
   if sys.argv[index].startswith('--expected'):
     expected = sys.argv[index][11:]
   elif sys.argv[index].startswith('--result'):
     result = sys.argv[index][9:]
   index += 1

 expected_input = open(expected, 'r')
 result_input = open(result, 'r')
 expected_lines = expected_input.readlines()
 result_lines = result_input.readlines()
 expected_input.close()
 result_input.close()

 correct = 0
 wrong = 0

 if len(expected_lines) != len(result_lines):
   print "line counts are not consistent"
 else:
   for exp, res in zip(expected_lines, result_lines):
     if exp == res:
       correct += 1
     else:
       wrong += 1

 accuracy = float(correct) / (correct + wrong)
 print "All: " + str(correct + wrong) + " Correct: " + str(correct);
 print "Accuracy = " + str(accuracy)