python的hashlib库

import hashlib

password =‘12f3456‘
m = hashlib.md5(password.encode())
# m1=hashlib.sha1(password.encode()) #sha1加密方法
# m2=hashlib.sha224(password.encode())

print(password.encode())  #字符串encode变成二进制 b‘123456‘，字符串只能转换成二进制的才能进行加密

print(dir(m)) #将m能用的方法全部展示.如果忘记了某个元素有什么方法，可以用dir()展示出来
‘‘‘‘


[‘__class__‘, ‘__delattr__‘, ‘__dir__‘, ‘__doc__‘, 
‘__eq__‘, ‘__format__‘, ‘__ge__‘, ‘__getattribute__‘,
 ‘__gt__‘, ‘__hash__‘, ‘__init__‘, ‘__init_subclass__‘, 
 ‘__le__‘, ‘__lt__‘, ‘__ne__‘, ‘__new__‘, ‘__reduce__‘, 
 ‘__reduce_ex__‘, ‘__repr__‘, ‘__setattr__‘, ‘__sizeof__‘, 
 ‘__str__‘, ‘__subclasshook__‘, ‘block_size‘, ‘copy‘, ‘digest‘, 
 ‘digest_size‘, ‘hexdigest‘, ‘name‘, ‘update‘]



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print(m.hexdigest())  #将m进行加密


print(len(m.hexdigest()))  #不管密码多长，只能返回一个32的MD5加密的字符串。且MD5不可逆