Python hashlib Unicode-objects must be encoded before hashing

Python2中没有这个问题

python3中

hashlib.md5(data)函数中data 参数的类型应该是bytes

hash前必须把数据转换成bytes类型

Python 2.7.12 (default, Dec  4 2017, 14:50:18)

[GCC 5.4.0 20160609] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> from hashlib import md5

>>> name = md5("hello")

>>> print(name.hexdigest())

5d41402abc4b2a76b9719d911017c592

Python 3.5.2 (default, Nov 23 2017, 16:37:01)

[GCC 5.4.0 20160609] on linux

Type "help", "copyright", "credits" or "license" for more information.

>>> from hashlib import md5

>>> name = md5("hello")

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

TypeError: Unicode-objects must be encoded before hashing

>>> name = md5("hello".encode("utf-8"))

>>> print(name.hexdigest())

5d41402abc4b2a76b9719d911017c592

巴特西

Python hashlib Unicode-objects must be encoded before hashing

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