What is the difference in initializing these all three variants in Python?

Question

#FIRST
A=0
B=0

#SECOND
A=B=0

#THIRD
A,B=0,0

Answer 1

I don't see any - check my code

https://code.sololearn.com/c6m4uVyJEb0q/?ref=app

Answer 2

they are all same...