Hw can I get to know some library functions are installed are not

Answer 1

help("modules")

works on SoloLearn. Sometimes it times out. If so, run it again.
https://code.sololearn.com/coysah9tIrqq/?ref=app

Answer 2

Good luck getting their phone numbers then...

Answer 3

it can be done at shell (not Python shell).
>pip list
(if you know what pip is).
you can try from Python
help("modules ")