Python生成文件的MD5

import hashlib


def calc_md5(filename):
    md5_hash = hashlib.md5()
    with open(filename, "rb") as f:
        # Read and update hash in chunks of 4K
        for byte_block in iter(lambda: f.read(4096), b""):
            md5_hash.update(byte_block)
        print(md5_hash.hexdigest())