Which libraries or modules i should learn and focus in python if i want to code professionnel program?

Question

Many Python modules !! I'm really confused

Answer 1

Some popular Python libraries for working with and displaying data (other than the math module) are NumPy, SciPy, and Matplotlib

Answer 2

https://www.sololearn.com/discuss/1775385/?ref=app

Answer 3

Consider my post above regarding app development on python. Received nice answers.