Python "is" statement: what is happening?

Question

(This question already has answers here): question from:https://stackoverflow.com/questions/3718513/python-is-statement-what-is-happening

Answer 1

a is not b is a special operator which is equivalent to not a is b.

The operator a is b returns True if a and b are bound to the same object, otherwise False. When you create two empty lists you get two different objects, so is returns False (and therefore is not returns True).