Question

for line in file2.splitlines():
  for l in file1.splitlines():
    if line in l:
     print l

我怎样才能摆脱重复？

Answer 1

如果我理解正确，您需要打印重复项。

你可以这样做：

print [line for line in file2.splitlines() if line in file1.splitlines()]

但是如果你想以更好的方式做到这一点，请使用sets：

print list(file2.splitlines() & file1.splitlines())

Answer 2

在第二个文件中创建一个字典，这将是一个更快的解决方案，它也将摆脱重复：

from collections import defaultdict

second_file = open('second.txt')
second_file_dict = defaultdict(int)
first_file_dict = defaultdict(int)

for line in second_file:
    second_file_dict[line.strip()] += 1
second_file.close()

first_file = open('first.txt')
for line in first_file:
    if line in second_file_dict and not in first_file_dict:
        print line
    first_file_dict[line.strip()] += 1        
first_file.close()

如何摆脱for循环中的重复

2 个答案: