博客简介
本篇博客主要介绍的是如何下载安装第三方库，包括如何搜索到第三方库生态中的所有库，如何用pip安装方法安装第三方库，以及pip常用指令简介
全球第三方库生态
我们也许经常看到博客上，github，公众号，论文，知乎…有各种眼花缭乱的第三方库，那么这些库都是哪里来的？当然有许多大牛自己写的库，但是大多数还是是用的全球第三方库生态中的库：
- 全球第三方库生态：https://pypi.org/
在这里，你可以通过搜索框找到全球优秀的第三方库
pip常用指令简介
如何安装这些库？最常用的方法是pip安装，打开命令行，输入相应指令：
Commands:
- install ： Install packages.
- download ： Download packages.
- uninstall ： Uninstall packages.
- reeze ： Output installed packages in requirements format.
- ist ： 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.
- 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:
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-h, --help Show help.
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–isolated Run pip in an isolated mode, ignoring environment variables and user configuration.
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-v, --verbose Give more output. Option is additive, and can be used up to 3 times.
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-V, --version Show version and exit.
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-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.
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–proxy < proxy > Specify a proxy in the form [user:passwd@]proxy.server:port.
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–retries < retries > Maximum number of retries each connection should attempt (default 5 times).
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–timeout < sec > Set the socket timeout (default 15 seconds).
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–exists-action < action > Default action when a path already exists: (s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.
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–trusted-host < hostname > Mark this host or host:port pair as trusted, even though it does not have valid or any HTTPS.
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–cert < path > Path to alternate CA bundle.
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–client-cert < path > Path to SSL client certificate, a single file containing the private key and the certificate in PEM format.
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–cache-dir < dir > Store the cache data in < dir >.
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–no-cache-dir Disable the cache.
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–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.
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–no-color Suppress colored output
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–no-python-version-warning Silence deprecation warnings for upcoming unsupported Pythons.
使用pip的问题
在使用pip安装第三方库依赖于网络，首先你的计算机必须联网，但是有时会出现Socket超时的问题，这时不妨试一试打开手机热点，再进行安装.
