[Python知识库]You are using pip version 21.1.2； however version 22.0.3 is available

问题：

	使用pip的时候总是提示：You are using pip version 21.1.2; however, version 22.0.3 is available.

例如

E:\MyProject\pythonProject\venv\Scripts>pip install xlrd1.2.0
Collecting xlrd1.2.0
Downloading xlrd-1.2.0-py2.py3-none-any.whl (103 kB)
|████████████████████████████████| 103 kB 163 kB/s
Installing collected packages: xlrd
Successfully installed xlrd-1.2.0

WARNING: You are using pip version 21.1.2; however, version 22.0.3 is available.
You should consider upgrading via the ‘E:\MyProject\pythonProject\venv\Scripts\python.exe -m pip install --upgrade pip’ command.

1.查看当前版本

E:\MyProject\pythonProject\venv\Scripts>pip show pip
Name: pip
Version: 21.1.2
Summary: The PyPA recommended tool for installing Python packages.
Home-page: https://pip.pypa.io/
Author: The pip developers
Author-email: distutils-sig@python.org
License: MIT
Location: e:\myproject\pythonproject\venv\lib\site-packages
Requires:
Required-by:

2.升级pip

E:\MyProject\pythonProject\venv\Scripts>python -m pip install -U pip
Requirement already satisfied: pip in e:\myproject\pythonproject\venv\lib\site-packages (21.1.2)
Collecting pip
Downloading pip-22.0.3-py3-none-any.whl (2.1 MB)
|████████████████████████████████| 2.1 MB 10 kB/s
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 21.1.2
Uninstalling pip-21.1.2:
Successfully uninstalled pip-21.1.2
Successfully installed pip-22.0.3

3.查看当前版本

E:\MyProject\pythonProject\venv\Scripts>pip show pip
Name: pip
Version: 22.0.3
Summary: The PyPA recommended tool for installing Python packages.
Home-page: https://pip.pypa.io/
Author: The pip developers
Author-email: distutils-sig@python.org
License: MIT
Location: e:\myproject\pythonproject\venv\lib\site-packages
Requires:
Required-by:

E:\MyProject\pythonProject\venv\Scripts>