Understanding Python's “is” operator

Question

The is operator does not match the values of the variables, but the instances themselves.

What does it really mean?

Answer 1

The is operator is nothing but an English version of ==. Because the IDs of the two lists are different so the answer is false. You can try:

a=[1,2,3]
b=a
print(b is a )#True

*Because the IDs of both the list would be same