Find all packages installed with easy_install/pip?

Question

pip freeze will output a list of installed packages and their versions. It also allows you to write those packages to a file that can later be used to set up a new environment.

https://pip.pypa.io/en/stable/reference/pip_freeze/#pip-freeze

As of version 1.3 of pip you can now use pip list

It has some useful options including the ability to show outdated packages. Here's the documentation: https://pip.pypa.io/en/latest/reference/pip_list/

If anyone is wondering you can use the 'pip show' command.

pip show [options] <package>

This will list the install directory of the given package.

Start with:

$ pip list

To list all packages. Once you found the package you want, use:

$ pip show <package-name>

This will show you details about this package, including its folder. You can skip the first part if you already know the package name

Click here for more information on pip show and here for more information on pip list.

Example:

$ pip show jupyter
Name: jupyter
Version: 1.0.0
Summary: Jupyter metapackage. Install all the Jupyter components in one go.
Home-page: http://jupyter.org
Author: Jupyter Development Team
Author-email: [email protected]
License: BSD
Location: /usr/local/lib/python2.7/site-packages
Requires: ipywidgets, nbconvert, notebook, jupyter-console, qtconsole, ipykernel    

If Debian behaves like recent Ubuntu versions regarding pip install default target, it's dead easy: it installs to /usr/local/lib/ instead of /usr/lib (apt default target). Check https://askubuntu.com/questions/173323/how-do-i-detect-and-remove-python-packages-installed-via-pip/259747#259747

I am an ArchLinux user and as I experimented with pip I met this same problem. Here's how I solved it in Arch.

find /usr/lib/python2.7/site-packages -maxdepth 2 -name __init__.py | xargs pacman -Qo | grep 'No package'

Key here is /usr/lib/python2.7/site-packages, which is the directory pip installs to, YMMV. pacman -Qo is how Arch's pac kage man ager checks for ownership of the file. No package is part of the return it gives when no package owns the file: error: No package owns $FILENAME. Tricky workaround: I'm querying about __init__.py because pacman -Qo is a little bit ignorant when it comes to directories :(

In order to do it for other distros, you have to find out where pip installs stuff (just sudo pip install something), how to query ownership of a file (Debian/Ubuntu method is dpkg -S) and what is the "no package owns that path" return (Debian/Ubuntu is no path found matching pattern). Debian/Ubuntu users, beware: dpkg -S will fail if you give it a symbolic link. Just resolve it first by using realpath. Like this:

find /usr/local/lib/python2.7/dist-packages -maxdepth 2 -name __init__.py | xargs realpath | xargs dpkg -S 2>&1 | grep 'no path found'

Fedora users can try (thanks @eddygeek):

find /usr/lib/python2.7/site-packages -maxdepth 2 -name __init__.py | xargs rpm -qf | grep 'not owned by any package'

pip.get_installed_distributions() will give a list of installed packages

import pip
from os.path import join

for package in pip.get_installed_distributions():
    print(package.location) # you can exclude packages that's in /usr/XXX
    print(join(package.location, package._get_metadata("top_level.txt"))) # root directory of this package

Newer versions of pip have the ability to do what the OP wants via pip list -l or pip freeze -l (--list).
On Debian (at least) the man page doesn't make this clear, and I only discovered it - under the assumption that the feature must exist - with pip list --help.

There are recent comments that suggest this feature is not obvious in either the documentation or the existing answers (although hinted at by some), so I thought I should post. I would have preferred to do so as a comment, but I don't have the reputation points.