python hashlib模块

Python的 提供的相关模块
用于加密相关的操作，3.x里用hashlib代替了md5模块和sha模块，主要提供 SHA1, SHA224, SHA256, SHA384, SHA512 ，MD5 算法

import hashlib
# md5
m = hashlib.md5()
m.update(b"Hello")
m.update(b"It's me")
print(m.digest())  # 返回2进制格式的hash值
m.update(b"It's been a long time since last time we ...")
print(m.hexdigest()) # 返回16进制格式的hash值
# sha1
s1 = hashlib.sha1()
s1.update("小猿圈".encode("utf-8"))
s1.hexdigest()
# sha256
s256 = hashlib.sha256()
s256.update("小猿圈".encode("utf-8"))
s256.hexdigest()
# sha512
s512 = hashlib.sha256()
s512.update("小猿圈".encode("utf-8"))
s512.hexdigest()