What is pip's equivalent of `npm install package --save-dev`?

Question

In nodejs, I can do npm install package --save-dev to save the installed package into the package.

How do I achieve the same thing in Python package manager

Answer 1

This simple line is a starting point. You can easily built a bash command to reuse the PACKAGE in the line.

pip install PACKAGE && pip freeze | grep PACKAGE >> requirements.txt

Thanks to @devsnd for the simple bash function example:

function pip-install-save { 
    pip install $1 && pip freeze | grep $1 >> requirements.txt
}

To use it, just run:

pip-install-save some-package