当我们pip升级失败后，再次使用pip回提示错误，有个简单的方法修复

easy_install --upgrade pip

Searching for pip
Reading https://pypi.python.org/simple/pip/
Downloading https://files.pythonhosted.org/packages/93/ab/f86b61bef7ab14909bd7ec3cd2178feb
0a1c86d451bc9bccd5a1aedcde5f/pip-19.1.1.tar.gz#sha256=44d3d7d3d30a1eb65c7e5ff1173cdf8f7467
850605ac7cc3707b6064bddd0958
Best match: pip 19.1.1
Processing pip-19.1.1.tar.gz
Writing C:\Users\XXX\AppData\Local\Temp\easy_install-b8orts5f\pip-19.1.1\setup.cfg
Running pip-19.1.1\setup.py -q bdist_egg --dist-dir C:\Users\lenovo\AppData\Local\Temp\eas
y_install-b8orts5f\pip-19.1.1\egg-dist-tmp-ne58ll8a
warning: no files found matching 'docs\docutils.conf'
warning: no previously-included files found matching '.coveragerc'
warning: no previously-included files found matching '.mailmap'
warning: no previously-included files found matching '.appveyor.yml'
warning: no previously-included files found matching '.travis.yml'
warning: no previously-included files found matching 'tox.ini'
warning: no files found matching 'Makefile' under directory 'docs'
warning: no files found matching '*.bat' under directory 'docs'
warning: no previously-included files found matching 'src\pip\_vendor\six'
warning: no previously-included files found matching 'src\pip\_vendor\six\moves'
warning: no previously-included files matching '*.pyi' found under directory 'src\pip\_ven
dor'
no previously-included directories found matching '.github'
no previously-included directories found matching '.azure-pipelines'
no previously-included directories found matching 'docs\build'
no previously-included directories found matching 'news'
no previously-included directories found matching 'tasks'
no previously-included directories found matching 'tests'
no previously-included directories found matching 'tools'
creating d:\XXX\venv\lib\site-packages\pip-19.1.1-py3.6.egg
Extracting pip-19.1.1-py3.6.egg to d:\stu_exam_byflask\venv\lib\site-packages
Adding pip 19.1.1 to easy-install.pth file
Installing pip-script.py script to D:\XXX\venv\Scripts
Installing pip.exe script to D:\XXX\venv\Scripts
Installing pip3-script.py script to D:\XXX\venv\Scripts
Installing pip3.exe script to D:\XXX\venv\Scripts
Installing pip3.6-script.py script to D:\XXX\venv\Scripts
Installing pip3.6.exe script to D:\XXX\venv\Scripts

Installed d:\XXX\venv\lib\site-packages\pip-19.1.1-py3.6.egg
Processing dependencies for pip
Finished processing dependencies for pip
此时会发现pip已经修复完成，而且版本到最新的19.1了

更多精彩内容