https://pip.pypa.io/en/stable/reference/pip_install/#pip-install
Official site: https://packaging.python.org/tutorials/installing-packages/
清华:https://pypi.tuna.tsinghua.edu.cn/simple
阿里云:http://mirrors.aliyun.com/pypi/simple/
中国科技大学 https://pypi.mirrors.ustc.edu.cn/simple/
豆瓣:http://pypi.douban.com/simple/
从清华源下载(临时) package
sudo -H pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple opencv-python opencv-contrib-python
设为默认
pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
升级pip
python -m pip install --upgrade pip
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pip -U
python -m pip install --extra-index-url https://pypi.tuna.tsinghua.edu.cn/simple
python -m pip install --no-index --find-links=/local/dir/ SomeProject
查看某个本地安装包目前的版本
ERROR: scikit-image 0.17.2 has requirement imageio>=2.3.0, but you'll have imageio 2.2.0 which is incompatible.
ERROR: scikit-image 0.17.2 has requirement scipy>=1.0.1, but you'll have scipy 1.0.0 which is incompatible.
Linux:
$ pip freeze | grep scipy
Windows:
c:\> pip freeze | findstr scipy
查看服务器端提供的版本
pip install scipy==
安装指定版本的package
pip install 'stevedore>=1.3.0,<1.4.0' --force-reinstall
pip install scipy==1.4.1 --force-reinstall