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python判断两个文件是否相同

此方法相当于 ​​Linux​​​ 系统下的​​diff​​​,或者是 ​​git​​​ 下的 ​​checkout​

官方解释请看:

​​https://docs.python.org/2/library/difflib.html​​

#!/usr/bin/env python
# -*# coding: utf-8 -*-

import difflib

if __name__ == '__main__':
# .splitlines(True)为保留了\r\n
a = open("diff1.txt", "r").read().splitlines(True)
b = open("diff3.txt", "r").read().splitlines(True)
# difflib.context_diff(a, b[, fromfile][, tofile][, fromfiledate][, tofiledate][, n][, lineterm])
# fromfile:a的文件名
# tofile:b的文件名
# fromfiledate:a文件的修改时间
# tofiledate:b文件的修改时间
# n:变化那一行前后n行展示,默认n=3
# lineterm:打印出来的换行符,默认为\n
diff = difflib.context_diff(a, b, fromfile='fromfile.txt', tofile='tofile.txt', n=0, lineterm="\n")
result = "".join(diff)
print result

打印结果:

python判断两个文件是否相同_python

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