微知-python包管理工具pip怎样检察安装了某个库？（pip3 show xxx；pip3 li
配景pip是python的一个包管理工具。平时只是install，但是很少检察安装了哪些？以及某个包详细信息。本文重要介绍list列出所有的包，以及show检察某个详细信息。顺带介绍install。
命令
list
pip3 list
https://i-blog.csdnimg.cn/direct/38ef1784a3b444fb835722fe5e1a44c0.png
show
pip3 show pyserial
https://i-blog.csdnimg.cn/direct/c88ce129e6c94843aaa02e2b74d00d86.png
-v 显示详细信息
https://i-blog.csdnimg.cn/direct/fbf3917a67c34814a85bfc5a539e6b75.png
install 安装
好比安装pyserial：pip3 install pyserial
https://i-blog.csdnimg.cn/direct/bb9730d03c824f89a174fd1050a1a1e6.png
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>
pip3 <command>
DESCRIPTION
pipisaPython package installer, recommended for installing Python
packages which are not available in the Debian archive. Itcanwork
withversioncontrol repositories (currently only Git, Mercurial, and
Bazaar repositories), logs outputextensively,andpreventspartial
installs by downloading all requirements before starting installation.
OnDebian,pipisthecommandto use when installing packages for
Python 2, while pip3 is the command to use when installing packages for
Python 3.
COMMANDS
Thecommand 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.
wheelBuild wheels from your requirements.
GENERAL OPTIONS
This list is by no means complete, and it only describes options avail-
abletoallcommands. 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 usedupto3
times.
-V, --version
Show version and exit.
-q, --quiet
Give less output.
--log-file <path>
Pathtoaverbose non-appending log, that only logs failures.
This log is active by default at ~/.pip/pip.log.
--log <path>
Path to a verboseappendinglog. Thislogisinactiveby
default.
--proxy <proxy>
Specify a proxy in the form proxy.server:port.
--timeout <sec>
Set the socket timeout (default 15 seconds).
--exists-action <action>
Defaultactionwhen 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>
Installaprojectin 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.Thisoptioncanbe
used multiple times.
-b,--build <dir>
Directoryto unpack packages into and build in.The default in
a virtualenv is "<venv path>/build". Thedefaultforglobal
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"<venvpath>/src". Thedefaultforglobal
installs is "<current dir>/src".
-U, --upgrade
Upgrade all packages tothenewestavailableversion. This
processisrecursiveregardlessofwhethera dependency is
already satisfied.
--force-reinstall
When upgrading, reinstall all packages even if they arealready
up-to-date.
-I, --ignore-installed
Ignore the installed packages (reinstalling instead).
--no-deps
Don't install package dependencies.
--install-option <options>
Extraargumentsto be supplied to the setup.py install command
(use like --install-option ="--install-scripts=/usr/local/bin").
Usemultiple--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>
Extraglobal options to be supplied to the setup.py call before
the install command.
--user Install using the user scheme.
--eggInstall packages as eggs, not 'flat', likepipnormallydoes.
This option is not about installing from eggs. (WARNING: Because
this option overrides pip's normal installlogic,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.
--preInclude pre-release and development versions.Bydefault,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
Ignorepackageindex(onlylookingat --find-links URLs
instead).
-f,--find-links <url>
Ifaurlor 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 Puredistutilspackagesinstalled with python setup.py install,
which leave behindnometadatatodeterminewhatfileswere
installed.
o Script wrappers installed by python setup.py develop.
-r,--requirement <file>
Uninstallallthepackageslistedin the given requirements
file.This option can be used multiple times.
-y, --yes
Don't ask for confirmation of uninstall deletions.
AUTHORS
Thismanualpagewasoriginallywritten 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>.
Permissionisgranted to copy, distribute and/or modify this document
under the terms of the GNU General Public License,version3orany
later version published by the Free Software Foundation.
AUTHOR
Barry Warsaw <barry@debian.org>
1.5.6 2014-06-03 PIP(1)
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