使用pip前 请确认 对应的Python解释器

pip -V
pip 22.1.2 from /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pip (python 3.7)


pip list
pip show XXX
pip install XXX
pip install xxx=1.0.0
pip install 'Markdown<2.0' 
pip install 'Markdown>2.0,<2.0.3


pip uninstall  xxx 

pip freeze 
pip freeze > requirements.txt

pip install -r requirements.txt


python setup.py build
python setup.py install