Why are the outputs not matching for same code on different compilers.

Question

a=500
b=500
print(a is b)

output by python 3.7 idle ( installed from python.org) is:
False

output by online ide of python 3.6 like codechef,geeksforgeeks is:
True

Answer 1

A very good explanation:
https://stackoverflow.com/questions/306313/is-operator-behaves-unexpectedly-with-integers

(Personally I prefer the second answer better than the marked as best one)

Answer 2

a is b dont check if they store same content . Checks id of element. The answer can be undefined.

Try a==b for comparing integers

Answer 3

Kuba Siekierzyński me too