md5方法在hashlib库中,使用前需要先导入。它的主要方法为update,copy,以及转换为二进制,十六进制。
用法说明:
Help on HASH object: class HASH(builtins.object)
| A hash represents the object used to calculate a checksum of a
| string of information.
|
| Methods:
|
| update() -- updates the current digest with an additional string
| digest() -- return the current digest value
| hexdigest() -- return the current digest as a string of hexadecimal digits
| copy() -- return a copy of the current hash object
实例如下:
>>> from hashlib import md5
>>> e='lilip@email.com'
>>> print(e)
lilip@email.com
>>> e_encode=e.lower().encode('utf-8')
>>> print(e_encode)
b'lilip@email.com'
>>> e_md5=md5(e_encode)
>>> print(e_md5)
<md5 HASH object @ 0x0000000002961B20>
>>> e_hex=e_md5.hexdigest() #转换为十六进制
>>> print(e_hex)
d56e0ee2ffdd3c8e8f75219044e6b781
>>> e_digest=e_md5.digest() #转换为二进制
>>> print(e_digest)
b'\xd5n\x0e\xe2\xff\xdd<\x8e\x8fu!\x90D\xe6\xb7\x81'
>>> e_copy=e_md5.copy() #copy用法
>>> print(e_copy)
<md5 HASH object @ 0x0000000002961B48>
>>> print(e_md5)
<md5 HASH object @ 0x0000000002961B20>
>>> e_md5.update('test'.encode('utf-8')) #update用法
>>> print(e_md5)
<md5 HASH object @ 0x0000000002961B20>
>>> print(e_md5.hexdigest())
8b3b5ccd79b8a1c6aa50e40ad1e479b8