How to fix "not defined" error when launching python game?

Question

Python

Hello, I decided to write my game in python.
When I run the program, I get an error:
Traceback (most recent call last):
File "game.py", line 15, in
isJump == False
NameError: name 'isJump' is not defined"

isJump == False

Answer 1

Would you show the code ... And so it is possible:
local variable might be referenced before assignment