Python安装模块常用镜像源

#Win 
python -m pip install xxx -i https://pypi.douban.com/simple
 
python -m pip install SomePackage==1.0.4    # specific version
python -m pip install "SomePackage>=1.0.4"  # minimum version

#使用并行安装的多个 Python 版本
#win
py -2   -m pip install SomePackage  # default Python 2
py -2.7 -m pip install SomePackage  # specifically Python 2.7
py -3   -m pip install SomePackage  # default Python 3
py -3.4 -m pip install SomePackage  # specifically Python 3.4

#在 Linux, Mac OS X 以及其他 POSIX 系统中
python2   -m pip install SomePackage  # default Python 2
python2.7 -m pip install SomePackage  # specifically Python 2.7
python3   -m pip install SomePackage  # default Python 3
python3.4 -m pip install SomePackage  # specifically Python 3.4

#将 --user 选项传入 python -m pip install 将只为当前用户而非为系统中的所有用户安装软件包