pip install --upgrade  pip

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Collecting pip
  Downloading https://pypi.tuna.tsinghua.edu.cn/packages/00/b6/9cfa56b4081ad13874b0c6f96af8ce16cfbc1cb06bedf8e9164ce5551ec1/pip-19.3.1-py2.py3-none-any.whl (1.4MB)
     |████████████████████████████████| 1.4MB 204kB/s
Installing collected packages: pip
  Found existing installation: pip 19.2.3
    Uninstalling pip-19.2.3:
      Successfully uninstalled pip-19.2.3
  Rolling back uninstall of pip
  Moving to c:\users\鬼义虎神\appdata\roaming\python\python37\scripts\pip.exe
   from C:\Users\鬼义虎神\AppData\Local\Temp\pip-uninstall-u207wbsg\pip.exe
  ...略...
ERROR: Exception:
  ...略...
  File "C:\Users\鬼义虎神\AppData\Roaming\Python\Python37\site-packages\pip\_vendor\distlib\scripts.py", line 231, in _write_script
    launcher = self._get_launcher('t')
  File "C:\Users\鬼义虎神\AppData\Roaming\Python\Python37\site-packages\pip\_vendor\distlib\scripts.py", line 370, in _get_launcher
    result = finder(distlib_package).find(name).bytes
AttributeError: 'NoneType' object has no attribute 'bytes'
WARNING: You are using pip version 19.2.3, however version 19.3.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

easy_install pip

Searching for pip
Best match: pip 19.3.1
Adding pip 19.3.1 to easy-install.pth file
Installing pip-script.py script to c:\python37\Scripts
Installing pip.exe script to c:\python37\Scripts
Installing pip3-script.py script to c:\python37\Scripts
Installing pip3.exe script to c:\python37\Scripts
Installing pip3.7-script.py script to c:\python37\Scripts
Installing pip3.7.exe script to c:\python37\Scripts

Using c:\python37\lib\site-packages
Processing dependencies for pip
Finished processing dependencies for pip

pip install --upgrade  pip

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple
Requirement already up-to-date: pip in c:\python37\lib\site-packages (19.3.1)