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Package requirements checker, plugin for flake8

Project description

This module provides a plug-in for flake8, which checks/validates package import requirements. It reports missing and/or not used project direct dependencies.

This plug-in adds new flake8 warnings:

  • I900: Package is not listed as a requirement.
  • I901: Package is require but not used.

Important notice

In order to collect project’s dependencies, this checker evaluates Python code from the file stored in the project’s root directory. Code evaluation is done with the eval() function. As a fall-back method, this checker also tries to load dependencies from the requirements.txt file.

At this point it is very important to be aware of the consequences of the above approach. One might inject malicious code into the file, which will be executed by this checker. Hence, this checker shall NEVER be use to check code from an unknown source! However, in most cases, one validates code from a known source (e.g. own code) and one will run script stored in the file anyway. The worst case scenario is, that this checker will execute the equivalent of the python, which shall be idempotent (it’s a horribly designed file if it’s not).

If you have noticed some side effects during the flake8 check and your file is written in a standard way (e.g. pypa-sampleproject), please fill out a bug report.


You can install, upgrade, or uninstall flake8-requirements with these commands:

$ pip install flake8-requirements
$ pip install --upgrade flake8-requirements
$ pip uninstall flake8-requirements

Project details

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