Python-第三方库管理与虚拟环境

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Python的第三方库

Python提供了大量的第三方库来给咱们使用，这也是Python的强大之处

三方库官网链接

可以直接搜索需要的Python三方库来使用

包管理工具pip

pip是Python的包管理工具，可以很方便的安装和管理第三方库(包)。类似于PHP中Composer，或者Nodejs中的npm，以及Linux中的yum

pip简单使用

可以直接使用 pip install 包名来安装指定三方库
例如安装 requests 库：

pip install requests

pip常用命令

帮助文档

可以通过 pip --help或pip -h查看 pip 的帮助文档

>> pip --help

Usage:   
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.
index                       Inspect information available from package indexes.
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.
--debug                     Let unhandled exceptions propagate outside the
main subroutine, instead of logging them to
stderr.
--isolated                  Run pip in an isolated mode, ignoring
environment variables and user configuration.
--require-virtualenv        Allow pip to only run in a virtual environment;
exit with an error otherwise.
-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.
--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 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 or host:port pair as trusted,
even though it does not have valid or any HTTPS.
--cert <path>               Path to PEM-encoded CA certificate bundle. If
provided, overrides the default. See 'SSL
Certificate Verification' in pip documentation
for more information.
--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.
--no-python-version-warning
Silence deprecation warni

本文标签： 第三方环境Python