python - 文件md5校验

通过md5校验文件，我们可以判断文件内容是否改变，用python实现代码如下

import hashlib
# 1.txt为空文本
with open('1.txt', 'rb') as f:
    data = f.read()
    md5Old = hashlib.md5(data).hexdigest()
    print(md5Old)  # d41d8cd98f00b204e9800998ecf8427e

# 1.txt内容为123
with open('1.txt', 'rb') as f:
    data = f.read()
    md5New = hashlib.md5(data).hexdigest()
    print(md5New)  # 202cb962ac59075b964b07152d234b70