What does PyCharm swear at: "Unused import statement less"?

Question

Python

Hello!
Tell me what PyCharm swears at: "Unused import statement less"
Wrote code in the IDLE python itself (Python 3.4 GUI), threw it into PyCharm:
from tkinter import * - everything is fine, but
from math import * - underlined, and became gray . Writes "Unused import statement less"
the code as a whole works, which is why I would like to disassemble and understand what is wrong.
I am newbie. :-) Win/Python 3.4 system
Thank you.

Answer 1

Do not use * until you know for sure that you need all the modules from the package,
paycharm told you that you imported the module and do not use it