List dependencies in Python
On your terminal type:
pip install pipdeptree
cd <your project root>
pipdeptree
Scan your import statements. Chances are you only import things you explicitly wanted to import, and not the dependencies.
Make a list like the one pip freeze does, then create and activate a virtualenv.
Do pip install -r your_list, and try to run your code in that virtualenv. Heed any ImportError exceptions, match them to packages, and add to your list. Repeat until your code runs without problems.
Now you have a list to feed to pip install on your deployment site.
This is extremely manual, but requires no external tools, and forces you to make sure that your code runs. (Running your test suite as a check is great but not sufficient.)
pipreqs solves the problem. It generates project-level requirement.txt file.
Install pipreqs: pip install pipreqs
- Generate project-level requirement.txt file:
pipreqs /path/to/your/project/ - requirements file would be saved in /path/to/your/project/requirements.txt
If you want to read more advantages of pipreqs over pip freeze, read it from here