背景
pip是python的一个包管理工具。平时只是install，但是很少查看安装了哪些？以及某个包详细信息。本文主要介绍list列出所有的包，以及show查看某个详细信息。顺带介绍install。
命令
list
pip3 list
show
pip3 show pyserial
-v 显示详细信息
install 安装
比如安装pyserial：pip3 install pyserial
其他
关键信息
man手册
PIP(1) PIP(1)
NAME
pip - A tool for installing and managing Python packages
SYNOPSIS
pip <command> [options]
pip3 <command> [options]
DESCRIPTION
pip is a Python package installer, recommended for installing Python
packages which are not available in the Debian archive. It can work
with version control repositories (currently only Git, Mercurial, and
Bazaar repositories), logs output extensively, and prevents partial
installs by downloading all requirements before starting installation.
On Debian, pip is the command to use when installing packages for
Python 2, while pip3 is the command to use when installing packages for
Python 3.
COMMANDS
The command comes before any options. The following commands are rec-
ognized:
help Show help for commands.
install
Install packages.
uninstall
Uninstall packages.
freeze Output installed packages in requirements format.
list List installed packages.
show Show information about installed packages.
search Search PyPI for packages.
wheel Build wheels from your requirements.
GENERAL OPTIONS
This list is by no means complete, and it only describes options avail-
able to all commands. Use pip <command> --help for more details on
command specific options. A few command options are provided below.
-h, --help
Show more detailed command help.
-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.
--log-file <path>
Path to a verbose non-appending log, that only logs failures.
This log is active by default at ~/.pip/pip.log.
--log <path>
Path to a verbose appending log. This log is inactive by
default.
--proxy <proxy>
Specify a proxy in the form [user:passwd@]proxy.server:port.
--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.
--cert <path>
Path to alternate CA bundle.
INSTALL OPTIONS
pip install installs packages from:
o PyPI (a.k.a. The Cheeseshop) and other indexes, using requirements
specifiers.
o VCS project urls.
o Local project directories.
o Local or remote source archives
-e,--editable <path/url>
Install a project in editable mode (i.e. setuptools "develop
mode") from a local project path or a VCS url.
-r,--requirement <file>
Install from the given requirements file. This option can be
used multiple times.
-b,--build <dir>
Directory to unpack packages into and build in. The default in
a virtualenv is "<venv path>/build". The default for global
installs is "<OS temp dir>/pip_build_<username>".
-t,--target <dir>
Install packages into <dir>.
-d,--download <dir>
Download packages into <dir> instead of installing them, regard-
less of what's already installed.
--download-cache <dir>
Cache downloaded packages in <dir>.
--src <dir>
Directory to check out editable projects into. The default in a
virtualenv is "<venv path>/src". The default for global
installs is "<current dir>/src".
-U, --upgrade
Upgrade all packages to the newest available version. This
process is recursive regardless of whether a dependency is
already satisfied.
--force-reinstall
When upgrading, reinstall all packages even if they are already
up-to-date.
-I, --ignore-installed
Ignore the installed packages (reinstalling instead).
--no-deps
Don't install package dependencies.
--install-option <options>
Extra arguments to be supplied to the setup.py install command
(use like --install-option ="--install-scripts=/usr/local/bin").
Use multiple --install-option options to pass multiple options
to setup.py install. If you are using an option with a directory
path, be sure to use absolute path.
--global-option <options>
Extra global options to be supplied to the setup.py call before
the install command.
--user Install using the user scheme.
--egg Install packages as eggs, not 'flat', like pip normally does.
This option is not about installing from eggs. (WARNING: Because
this option overrides pip's normal install logic, requirements
files may not behave as expected.)
--root <dir>
Install everything relative to this alternate root directory.
--compile
Compile py files to pyc.
--no-compile
Do not compile py files to pyc.
--no-use-wheel
Do not find and prefer wheel archives when searching indexes and
find-links locations.
--pre Include pre-release and development versions. By default, pip
only finds stable versions.
--no-clean
Don't clean up build directories.
Package Index Options:
-i,--index-url <url>
Base URL of Python Package Index (default
https://pypi.python.org/simple/).
--extra-index-url <url>
Extra URLs of package indexes to use in addition to --index-url.
--no-index
Ignore package index (only looking at --find-links URLs
instead).
-f,--find-links <url>
If a url or path to an html file, then parse for links to ar-
chives. If a local path or file:// url that's a directory, then
look for archives in the directory listing.
--allow-external <package>
Allow the installation of externally hosted files
--allow-all-external
Allow the installation of all externally hosted files
--allow-unverified <package>
Allow the installation of insecure and unverifiable files
--process-dependency-links
Enable the processing of dependency links.
UNINSTALL OPTIONS
pip is able to uninstall most installed packages. Known exceptions are:
o Pure distutils packages installed with python setup.py install,
which leave behind no metadata to determine what files were
installed.
o Script wrappers installed by python setup.py develop.
-r,--requirement <file>
Uninstall all the packages listed in the given requirements
file. This option can be used multiple times.
-y, --yes
Don't ask for confirmation of uninstall deletions.
AUTHORS
This manual page was originally written by Jeff Licquia <-
licquia@debian.org>, later rewritten by Carl Chenet <-
chaica@debian.org>. It was rewritten again and the source converted to
reStructuredText by Barry Warsaw <barry@debian.org>.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU General Public License, version 3 or any
later version published by the Free Software Foundation.
AUTHOR
Barry Warsaw <barry@debian.org>
1.5.6 2014-06-03 PIP(1)