What are the different python modules that come in handy while coding?

Question

There are tons of modules.
I wanna know the important ones and important functions present there.

Answer 1

That is hard to say because every module is important for *some* area. So if someone answers this, you'll likely get a list of stuff that person has to use frequently.
Important, but not in all cases and for everyone - that's why they are in the standard library and not in the core functionality.