pyhton获取文件md5哈希编码

import hashlib

def md5sum(filename, blocksize=65536):
    hash = hashlib.md5()
    with open(filename, "rb") as f:
        for block in iter(lambda: f.read(blocksize), b""):
            hash.update(block)
    return hash.hexdigest()

 md5可以对每个文件获取近似独一无二的编码