How to Fix the \'No module named pkg_resources\' Error When Using pip?

"No module named pkg_resources" Error While Running pip install

Problem Statement

Users may encounter an error when running pip install -r requirements.txt within a virtual environment, stating "ImportError: No module named pkg_resources." This indicates that the pkg_resources module is missing or inaccessible.

Resolution

As of July 2018, the recommended solution is to run the following command:

pip install setuptools

This will install or update the setuptools package, which includes the pkg_resources module. If using a package manager, one may also need to install the python-setuptools package.

Explanation

The pkg_resources module is part of the Python setuptools package. If this package is missing or broken, it can lead to the above error.

Legacy Method (Not Recommended)

Prior to July 2018, a "legacy" method involved using a bootstrap script:

wget https://bootstrap.pypa.io/ez_setup.py -O - | python

However, this method is no longer recommended as the preferred installation mechanism for setuptools .

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