Hii
You are overcomplicating things by first doing a stat on /usr/bin/pip.
Besides that, the existence of that path is a very fragile way of detecting if the python3-package is installed.
If you only want to install something if it is not installed already, then that is just what the apt module will do.
That is called idempotence, and IMHO is one of the key features of ansible.
Just have one apt task and be done with it.
The output also notifies you that the group name you use is illegal. It also tells you how to get more information (using -vvvv).
In general, before posting questions, make sure that you don't unnecessarily complicate things by adding obvious errors.
It will give a somewhat careless impression, and it will distract the audience, neither of which will help you get answers to your question.