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Pip is Python's package management system. It references packages available in the official Python Package Index (PyPI).

Install

Emerge

root #emerge --ask dev-python/pip

Usage

In order for pip to operate correctly when installing new packages an active internet connection is a requirement.

Invocation

user $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.
  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.
  --isolated                  Run pip in an isolated mode, ignoring environment variables and user configuration.
  -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.
  --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 alternate CA bundle.
  --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 warnings for upcoming unsupported Pythons.

Package installation

Warning
Running pip as root is not advised. It can render important system tools like emerge useless.

Important
It is important to understand that packages installed using pip will not be tracked by Portage. This is the case for installing any package through means other than the emerge command. Possible conflicts can be created when installing a Python package that is available in the Portage tree, then installing the same package using pip.

Decide which package manager will work best for the use case: either use emerge or pip for Python packages, but not both. Some Python packages are not available in the Portage tree, in these cases the only option is to use pip. One possibility is to use the --user option to install Python packages in a user's home directory. This will avoid conflicts with Portage. Be wise and make good choices!

To install a package using the pip command, where package is the desired package:

user $pip install <package>

To install the package in a user's home directory, be signed-in as the desired user, then issue:

user $pip install --user <package>

This will install the package in the user's ~/.local/ directory.

Removal

To remove a package using pip:

user $pip uninstall <package>

See also

• Application level package management — provides best practice recommendations on managing the coexistence of operating system and application level package managers on Gentoo.
• Gem — programs and libraries for the Ruby programming language.
• Portage — the official package manager and distribution system for Gentoo.
• Project:Python/Dependencies - How to turn PyPI dependencies to those of ebuild.

External resources

• Python/Virtual environment (ArchWiki article) - Isolated Python's environment, enabling sandboxed installation of packages.