Why requirements.txt?Any application typically has a set of dependencies that are required for that application to work. The requirements file is a way to specify and install specific set of package dependencies at once.
Format for requirements file:
$ pip freeze > requirements.txt
Use pip’s freeze command to generate a requirements.txt file for your project:
If you save this in requirements.txt, then you can
pip install -r requirements.txt.
Method 2:Use pipreqs - pipreqs used to generate requirements.txt file for any project based on imports
Why not pip freeze ?
- pip freeze saves all packages in the environment including those that you don’t use in your current project. (if you don’t have virtualenv)
- pip freeze only saves the packages that are installed with pip install in your environment.
- sometimes you just need to create requirements.txt for a new project without installing modules.
How to use?
$ pip install pipreqs $ pipreqs /path/to/project
for additional options see https://github.com/bndr/pipreqs