使 you-get 或者 youtube-dl 等网站视频下载工具，经常会因为视频网站的更新策略，而导致下载视频失败，如：

$ you-get.exe https://www.youtube.com/watch?v=f5YzxDvm67A
you-get: [error] oops, something went wrong.
you-get: don't panic, c'est la vie. please try the following steps:
you-get:   (1) Rule out any network problem.
you-get:   (2) Make sure you-get is up-to-date.
you-get:   (3) Check if the issue is already known, on
you-get:         https://github.com/soimort/you-get/wiki/Known-Bugs
you-get:         https://github.com/soimort/you-get/issues
you-get:   (4) Run the command with '--debug' option,
you-get:       and report this issue with the full output.

有时候更新安装包能够解决问题，如果是使用 pip 安装方式，可以很简单地升级。

pip install 选项

$ pip install --help
  --user                      Install to the Python user install directory for
                              your platform. Typically ~/.local/, or
                              %APPDATA%\Python on Windows. (See the Python
                              documentation for site.USER_BASE for full
                              details.)

  -U, --upgrade               Upgrade all specified packages to the newest
                              available version. The handling of dependencies

使用 upgrade 选项更新：

pip install <package_name> --upgrade

使用 -U 简写：

pip install <package_name> -U

如果需要权限可以加上 sudo。

也可以使用 user 标识，只在当前用户上安装：

pip install <package_name> --upgrade --user

使用 pip 更新指定的安装包

pip install 选项