最近写程序发现关于requests上传中文参数时候编码有问题，而把代码换成Python2确没有问题，十分困扰，具体的问题是

  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\requests\api.py", line 112, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\requests\api.py", line 58, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\requests\sessions.py", line 512, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\requests\sessions.py", line 622, in send
    r = adapter.send(request, **kwargs)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\requests\adapters.py", line 445, in send
    timeout=timeout
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\connectionpool.py", line 601, in urlopen
    chunked=chunked)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\urllib3\connectionpool.py", line 357, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\http\client.py", line 1239, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\http\client.py", line 1284, in _send_request
    body = _encode(body, 'body')
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\http\client.py", line 161, in _encode
    (name.title(), data[err.start:err.end], name)) from None
UnicodeEncodeError: 'latin-1' codec can't encode characters in position 21258-21262: Body ('测试不正常') is not valid Latin-1. Use body.encode('utf-8') if you want to send it encoded in UTF-8.

ok,那我编码成utf-8试试，出现以下错误：

  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\json\__init__.py", line 238, in dumps
    **kw).encode(obj)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\json\encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\json\encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python36\lib\json\encoder.py", line 180, in default
    o.__class__.__name__)
TypeError: Object of type 'bytes' is not JSON serializable

bytes格式的还不行，仔细思考了一下错误，最终将代码改成了

userInfo = name.encode("utf-8").decode("latin1")

先编码成bytes格式再解码为latin1