python base64

>>> s='我'
>>> base64.b64encode(s)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python33\lib\base64.py", line 58, in b64encode
    raise TypeError("expected bytes, not %s" % s.__class__.__name__)
TypeError: expected bytes, not str

出现上面的错误，就用下面这行。

>>> base64.b64encode(s.encode(encoding='utf-8'))
b'5oiR'

>>> base64.b64encode(s.encode(encoding='utf-8')).decode('utf-8')
'5oiR'