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pip install -U中的“-U”选项代表什么？

[英]What does the “-U” option stand for in pip install -U

原文 2012-09-15 06:48:54 2 1 python/ command-line/ pip

Despite a ton of Googling, I can't find any docs for pip's command line options/arguments. 尽管有大量的谷歌搜索，我找不到任何pip命令行选项/参数的文档。 What does pip install -U mean? pip install -U是什么意思？ Does anyone have a link to a list of pip's options and arguments? 有人有链接到pip的选项和参数列表吗？

1 个解决方案

Type pip install -h to list help: 输入pip install -h列出帮助：

-U, --upgrade Upgrade all packages to the newest available version -U， - upgrade将所有软件包升级到最新的可用版本

So, if you already have a package installed, it will upgrade the package for you. 因此，如果您已经安装了软件包，它将为您升级软件包。 Without the -U switch it'll tell you the package is already installed and exit. 没有-U开关，它会告诉你包已经安装并退出。

Each pip subcommand has its own help listing. 每个pip子命令都有自己的帮助列表。 pip -h shows you overall help, and pip [subcommand] -h gives you help for that sub command, such as install . pip -h显示了整体帮助， pip [subcommand] -h为您提供了该子命令的帮助，例如install 。

You can also find the full reference documentation online ; 您还可以在线查找完整的参考文档 ; the General Options section covers switches available for every pip subcommand, while each subcommand has a separate Options section to cover subcommand-specific switches; “ 常规选项”部分介绍了每个pip子命令可用的开关，而每个子命令都有一个单独的“ 选项”部分，以涵盖特定于子命令的开关; see the pip install options section , for example. 例如，请参阅pip install options部分。