base64的urlsafe_b64encode应该不会产生等号‘=’的对吧，我试了一下不行啊

[JeanLove]

Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:53:40) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import base64
>>>
>>> print base64.urlsafe_b64encode("abcde")
YWJjZGU=
>>>

[oyljerry]

base64中有＝符合

[shiefzhang]

urlsafe_b64encode是处理+和/，=是为了补足字符长度为4的倍数。