Which function or operator should you use to obtain the answer True or False to the question: "Do two variables refer to the same object?"

Which function or operator should you use to obtain the answer True or False to the question: "Do two variables refer to the same object?"
A . The = operator
B. The isinstanceO function
C. The id () function
D. The is operator

View Answer

Answer: D

Explanation:

To test whether two variables refer to the same object in memory, you should use the is operator. The is operator returns True if the two variables point to the same object in memory, and False otherwise.

For example:

a = [1, 2, 3]

b = a

c = [1, 2, 3]

print(a is b) # True

print(a is c) # False

In this example, a and b refer to the same list object in memory, so a is b returns True. On the other hand, a and c refer to two separate list objects with the same values, so a is c returns False.

Reference:

Official Python documentation on

Comparisons: https://docs.python.org/3/reference/expressions.html#not-in

Official Python documentation on Identity

comparisons: https://docs.python.org/3/reference/expressions.html#is

The is operator is used to test whether two variables refer to the same object in memory. If two variables x and y refer to the same object, the expression x is y will evaluate to True. Otherwise, it will evaluate to False.