grep output to pip install

Question

How to take a subset of python dependencies in requirements.txt and using grep send them to pip install?

Let's say I want to install redis and gunicorn only: with

cat requirements.txt | grep "redis\|gunicorn" 

I get only the dependencies I want,

redis>=3.5.3
gunicorn>=20.1.0

but I would like to pass it as requirement file to pip install.

I guess I should create a temp file with the output of grep and do something like pip install -r tempfile, but I don't understand how to do it.

Could anyone help me?

Answer 1

You can use xargs to pass the outputs to pip:

grep "redis\|gunicorn" requirements.txt | xargs pip install