一个很简单的MD5计算，python hashlib

import hashlib
import time

large = 0
md5 = hashlib.md5()
start = time.time()
with open('test.py', 'rb') as f:
    a = f.read(2048)
    md5.update(a)
    large = len(a) + large
    while len(a) > 0:
        a = f.read(2048)
        md5.update(a)
        large = len(a)+large
end = time.time()
print('md5: %s:' %md5.hexdigest())
print(int(large)/1024)
print(end - start)