因为安装的 PyHook3 没安装对吧，有点问题，就想着把它卸载掉，然后再重新安装一个，那应该怎么卸载呢？

非常简单，就是 pip uninstall xxx，正好和我们安装时的 pip install xxx 对应，下面还有一个确定操作，填 y 就是继续了，n 就是取消了。

python 库卸载演示：

cmd 直接输入 pip，回车就可以看到 pip 的命令大全了。

C:\Users\Administrator>pipUsage:pip <command> [options]Commands:install                     Install packages.download                    Download packages.uninstall                   Uninstall packages.freeze                      Output installed packages in requirements format.list                        List installed packages.show                        Show information about installed packages.check                       Verify installed packages have compatible dependencies.config                      Manage local and global configuration.search                      Search PyPI for packages.cache                       Inspect and manage pip's wheel cache.wheel                       Build wheels from your requirements.hash                        Compute hashes of package archives.completion                  A helper command used for command completion.debug                       Show information useful for debugging.help                        Show help for commands.General Options:-h, --help                  Show help.--isolated                  Run pip in an isolated mode, ignoringenvironment variables and user configuration.-v, --verbose               Give more output. Option is additive, and can beused up to 3 times.-V, --version               Show version and exit.-q, --quiet                 Give less output. Option is additive, and can beused up to 3 times (corresponding to WARNING,ERROR, and CRITICAL logging levels).--log <path>                Path to a verbose appending log.--no-input                  Disable prompting for input.--proxy <proxy>             Specify a proxy in the form[user:passwd@]proxy.server:port.--retries <retries>         Maximum number of retries each connection shouldattempt (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 or host:port pair 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 filecontaining the private key and the certificatein PEM format.--cache-dir <dir>           Store the cache data in <dir>.--no-cache-dir              Disable the cache.--disable-pip-version-checkDon't periodically check PyPI to determinewhether a new version of pip is available fordownload. Implied with --no-index.--no-color                  Suppress colored output--no-python-version-warningSilence deprecation warnings for upcomingunsupported Pythons.--use-feature <feature>     Enable new functionality, that may be backwardincompatible.--use-deprecated <feature>  Enable deprecated functionality, that will beremoved in the future.

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