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)