python - Ignore certain packages and their dependencies with pip freeze

Question

Title basically says it all. How can I tell pip freeze to ignore certain packages, like pylint and pep8, and their dependencies?

Answer 1

My approach is the following:

1. I my .bashrc I create the following alias: alias pipfreezeignore='pip freeze | grep -vFxf ignore_requirements.txt'
2. Create the virtual environment, and install first all the packages that I do not want to keep track of (i.e. pip install jedi flake8 importmagic autopep8 yapf).
3. Immediately save them in a ignore_requirements.txt file, as in pip freeze > ignore_requirements.txt.
4. Install the rest of packages (e.g. pip install django)
5. Use pipfreezeignore > requirements.txt (in the same folder where ignore_requirements.txt is) so I just get in requirements.txt the installed packages that are not in ignore_requirements.txt

If you always want to ignore the same packages (through all your virtual environments), you might redefine the alias as in alias pipfreezeignore='pip freeze | grep -vFxf /abs/path/to/ignore_requirements.txt' Just make sure that no packages from ignore_requirements.txt are not actually necessary for your project.