pip安装扩展库

pip是一个安装和管理Python包的工具，通过pip来管理Python包非常简单

usage: pip [options]

commands:

  install         Install packages

  uninstall     Uninstall psackages

  freeze        Output installed packages in requirements format

  list              List installed packages

  show          Show information about installed packages

  search        Search pypi for packages

  wheel          Build wheels from your requirements

  zip              DEPRECATED.  Zip individual packages

  unzip          DEPRECATED.  Unzip individual packages

  bundle        DEPRECATED. Create pybundles

  help            Show  help for commands

General Option:

  -h,--help           Show help

  -v,--verbose     Give more output.Option is additive,and can be used up to 3 times.

  -V,--version      Show version and exit

  -q,--quitet         Give less output

  --log--file Path to a verbose non-appending log,that only