pip (package manager)

pip

An output of pip --help
Initial release April 4, 2011 (2011-04-04)[1]
Stable release
9.0.0[2] / November 2, 2016 (2016-11-02)
Repository github.com/pypa/pip
Written in Python
Operating system OS-independent
Platform Python
Type Package management system
License Free software[3]
Website pip.pypa.io

pip is a package management system used to install and manage software packages written in Python. Many packages can be found in the Python Package Index (PyPI).[4]

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]

pip is a recursive acronym that can stand for either "Pip Installs Packages" or "Pip Installs Python".[6][7]

Command-line interface

An output of pip install virtualenv

Most distributions of Python come with pip preinstalled. If pip is missing, it can be installed through the system package manager or by invoking

curl https://bootstrap.pypa.io/get-pip.py | python

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

pip install some-package-name

Users can also easily remove the package:

pip uninstall some-package-name

Most importantly pip has a feature to manage full lists of packages and corresponding version numbers, possible through a "requirements" file.[4] 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 requirements.txt file and the following command:

pip install -r requirements.txt

Install some package for a specific version python, where ${version} is replaced for 2, 3, 3.4, etc.:

pip${version} install some-package-name

Web hosting service use

Pip is used to support the use of Python in cloud web hosting, such as by Heroku.[8]

See also

References

  1. ↑ 1.0 release commit
  2. ↑ "Release Notes".
  3. ↑ "LICENSE.txt". github.com/pypa/pip. Retrieved 25 July 2015.
  4. 1 2 "pip documentation". The pip developers. Retrieved 5 January 2012.
  5. ↑ "pip installation". Retrieved 24 Feb 2015.
  6. ↑ "pip - ubuntuusers.de". ubuntuusers.de. Retrieved 17 February 2015.
  7. ↑ "What Does PIP Stand For?". Stack Exchange. Retrieved 17 February 2015.
  8. ↑ "Getting Started with Python on Heroku/Cedar". Dev Center. Heroku. Retrieved 5 January 2012.


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