# wget https://bootstrap.pypa.io/get-pip.py --no-check-certificate
# python get-pip.py

pip install package_name

pip show --files package_name

pip list --outdated

pip install --upgrade package_name

pip uninstall package_name

# pip --help

Usage:
  pip <command> [options]

Commands:
  install                     Install packages.  安装包
  download                    Download packages. 下载包
  uninstall                   Uninstall packages. 卸载包
  freeze                      Output installed packages in requirements format. 按着一定格式输出已安装包列表
  list                        List installed packages. 列出已安装包
  show                        Show information about installed packages. 显示包详细信息
  check                       Verify installed packages have compatible dependencies.检查包的依赖关系是否完整
  config                      Manage local and global configuration.管理配置
  search                      Search PyPI for packages.搜索包
  wheel                       Build wheels from your requirements.
  hash                        Compute hashes of package archives.计算包的hash值 
  completion                  A helper command used for command completion.
  help                        Show help for commands.

General Options:
  -h, --help Show help.   --isolated Run pip in an isolated mode, ignoring environment variables and user configuration.   -v, --verbose Give more output. Option is additive, and can be used up to 3 times.   -V, --version Show version and exit.   -q, --quiet Give less output. Option is additive, and can be used up to 3 times (corresponding to WARNING, ERROR, and CRITICAL logging levels).   --log <path> Path to a verbose appending log.   --proxy <proxy> Specify a proxy in the form [user:passwd@]proxy.server:port.   --retries <retries> Maximum number of retries each connection should attempt (default 5 times).   --timeout <sec> Set the socket timeout (default 15 seconds).   --exists-action <action> Default action when a path already exists: (s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort).   --trusted-host <hostname> Mark this host as trusted, even though it does not have valid or any HTTPS.   --cert <path> Path to alternate CA bundle.   --client-cert <path> Path to SSL client certificate, a single file containing the private key and the certificate in PEM format.   --cache-dir <dir> Store the cache data in <dir>.   --no-cache-dir Disable the cache.   --disable-pip-version-check                               Don't periodically check PyPI to determine whether a new version of pip is available for download. Implied with --no-index.
  --no-color Suppress colored output