https://pip.pypa.io/en/latest/quickstart.html
首先, 安装 pip.
从 PyPI 安装包:
 
$ pip install SomePackage
  [...]
  Successfully installed SomePackage 
显示安装的文件:
 
$ pip show --files SomePackage
  Name: SomePackage
  Version: 1.0
  Location: /my/env/lib/pythonx.x/site-packages
  Files:
   ../somepackage/__init__.py
   [...] 
显示过时的包:
 
$ pip list --outdated
  SomePackage (Current: 1.0 Latest: 2.0) 
升级包:
 
$ pip install --upgrade SomePackage
  [...]
  Found existing installation: SomePackage 1.0
  Uninstalling SomePackage:
    Successfully uninstalled SomePackage
  Running setup.py install for SomePackage
  Successfully installed SomePackage 
卸载包:
 
$ pip uninstall SomePackage
  Uninstalling SomePackage:
    /my/env/lib/pythonx.x/site-packages/somepackage
  Proceed (y/n)? y
  Successfully uninstalled SomePackage 










