Pip Install Os X

Original author(s)Ian Bicking
Initial release4 April 2011 (9 years ago)[1]
Stable release
21.0 / 23 January 2021 (56 days ago)[2]
Written inPython
Operating systemOS-independent
TypePackage management system

While OS X comes with a large number of Unix utilities, those familiar with Linux systems will notice one key component missing: a package manager. Homebrew fills this void. To install Homebrew, open Terminal or your favorite OS X terminal emulator and run $. To pip install OpenCV on your Raspberry Pi system, be sure to use sudo like this: $ sudo pip install opencv-contrib-python4.1.0.25 2019-11-21 Update: Readers have reported that some versions of OpenCV 4 as installed via pip do not work properly on the Raspberry Pi. Pip accesses the Python Package Index, PyPI, which stores almost 200,000 projects and all previous releases of said projects. Because the repository keeps previous versions, you can pin to a version and not worry about updates causing conflicts. Pip can also install packages in local virtualenv, or virtual environment. Pip is the preferred installer program. Starting with Python 3.4, it is included by default with the Python binary installers. A virtual environment is a semi-isolated Python environment that allows packages to be installed for use by a particular application, rather than being installed system wide.

pip is a package-management system written in Python used to install and manage software packages.[4] It connects to an online repository of public and paid-for private packages, called the Python Package Index.

Most distributions of Python come with pip preinstalled. Python 2.7.9 and later (on the python2 series), and Python 3.4 and later include pip (pip3 for Python 3) by default.[5]


First introduced as pyinstall in 2008 by Ian Bicking (the creator of the virtualenv package) as an alternative to easy_install,[6][7] pip was chosen as the new name from one of several suggestions that the creator received on his blog post.[8] According to Bicking himself, the name is a recursive acronym for 'Pip Installs Packages'.[9] In 2011, the Python Packaging Authority (PyPA) was created to take over the maintenance of pip and virtualenv from Bicking, led by Carl Meyer, Brian Rosner, and Jannis Leidel.[7]

With the release of pip version 6.0 (2014-12-22), the version naming process was changed to have version in X.Y format and drop the preceding 1 from the version label.

Command-line interface[edit]

An output of pip install virtualenv

One major advantage of pip is the ease of its command-line interface, which makes installing Python software packages as easy as issuing a command:

Users can also easily remove the package:

Most importantly, pip has a feature to manage full lists of packages and corresponding version numbers, possible through a 'requirements' file.[10] This permits the efficient re-creation of an entire group of packages in a separate environment (e.g. another computer) or virtual environment. This can be achieved with a properly formatted file and the following command,[11] where requirements.txt is the name of the file:


To install some package for a specific python version, pip provides the following command, where ${version} is replaced by 2, 3, 3.4, etc.:

Using setup.py[edit]

Pip provides a way to install user-defined projects locally with the use of setup.py file. This method requires the python project to have the following file structure:

Within this structure, user can add setup.py to the root of the project (i.e. example_project for above structure) with the following content:

After this, pip can install this custom project by running the following command, from the project root directory:

See also[edit]

  • Anaconda – uses Conda
  • Python Package Index (PyPI)
  • npm – Node.js Package Manager


  1. ^Release 1.0
  2. ^'Changelog - pip documentation v21.0'. pip.pypa.io. Retrieved 25 January 2021.
  3. ^'pip/LICENSE.txt'. Github. 17 April 2018. Archived from the original on 1 June 2018. Retrieved 1 June 2018.
  4. ^Kollár, László. 'Managing Python packages the right way'. Opensource.com. Red Hat. Retrieved 23 June 2019.
  5. ^'pip installation'. Retrieved 24 February 2015.
  6. ^Bicking, Ian (24 September 2008). 'pyinstall: A New Hope'. Archived from the original on 27 September 2008. Retrieved 4 March 2020.
  7. ^ ab'Packaging History'. Python Packaging Authority. Retrieved 4 March 2020.
  8. ^Bicking, Ian (1 October 2008). 'pyinstall pybundles'. Retrieved 4 March 2020.
  9. ^Bicking, Ian (28 October 2008). 'pyinstall is dead, long live pip!'. Retrieved 4 March 2020.
  10. ^'pip documentation'. The pip developers. Retrieved 5 January 2012.
  11. ^Gahlot, Gaurav (6 November 2018). 'Most Important pip Commands for a Python Developer - DZone Open Source'. dzone.com. Retrieved 23 June 2019.

External links[edit]

Retrieved from 'https://en.wikipedia.org/w/index.php?title=Pip_(package_manager)&oldid=1013287910'

Do I need to install pip?¶

pip is already installed if you are using Python 2 >=2.7.9 or Python 3 >=3.4downloaded from python.org or if you are workingin a Virtual Environmentcreated by virtualenv or venv. Just make sureto upgrade pip.

Use the following command to check whether pip is installed:

Using Linux Package Managers¶



If you installed Python from a package manager on Linux, you should alwaysinstall pip for that Python installation using the same source.

See pypug:Installing pip/setuptools/wheel with Linux Package Managersin the Python Packaging User Guide.

Here are ways to contact a few Linux package maintainers if you run intoproblems:

  • Debian Python Team (for generalissues related to apt)

pip developers do not have control over how Linux distributions handle pipinstallations, and are unable to provide solutions to related issues ingeneral.

Using ensurepip¶

Python >=3.4 can self-bootstrap pip with the built-inensurepip module. Download macos catalina image for vmware. Refer to the standard librarydocumentation for more details. Make sure to upgrade pipafter ensurepip installs pip.

See the Using Linux Package Managers section if your Python reportsNomodulenamedensurepip on Debian and derived systems (e.g. Ubuntu).

Installing with get-pip.py¶


Be cautious if you are using a Python install that is managed by your operatingsystem or another package manager. get-pip.py does not coordinate withthose tools, and may leave your system in an inconsistent state.

To manually install pip, securely 1 download get-pip.py by followingthis link: get-pip.py. Alternatively, use curl:

Then run the following command in the folder where youhave downloaded get-pip.py:

get-pip.py also installs setuptools2 and wheelif they are not already. setuptools is required to installsource distributions. Both arerequired in order to build a Wheel Cache (which improves installationspeed), although neither are required to install pre-built wheels.


The get-pip.py script is supported on the same python version as pip.For the now unsupported Python 2.6, alternate script is availablehere.

get-pip.py options¶


If set, do not attempt to install setuptools


If set, do not attempt to install wheel

get-pip.py allows pip install options and the general options. Below aresome examples:

Install from local copies of pip and setuptools:

Install to the user site 3:

Install behind a proxy:

get-pip.py can also be used to install a specified combination of pip,setuptools, and wheel using the same requirements syntax as pip:

Upgrading pip¶

Python and OS Compatibility¶

pip works with CPython versions 3.6, 3.7, 3.8 and also PyPy.

This means pip works on the latest patch version of each of these minorversions. Previous patch versions are supported on a best effort approach.

Pip Install Os X 10 11 4

pip works on Unix/Linux, macOS, and Windows.


“Secure” in this context means using a modern browser or atool like curl that verifies SSL certificates when downloading fromhttps URLs.


Beginning with pip v1.5.1, get-pip.py stopped requiring setuptools tobe installed first.


Install Os X 10.11.4

The pip developers are considering making --user the default for allinstalls, including get-pip.py installs of pip, but at this time,--user installs for pip itself, should not be considered to be fullytested or endorsed. For discussion, see Issue 1668.


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