The equality operator (==) compares the values ??of the two operands and checks if the values ??are equal. While the 'is' operator checks whether both operands refer to the same object or not (it is in the same place in memory).

# python3 code to
# illustrate the
# difference between
# == and is operator
# [] is an empty list
list1 = []
list2 = []
list3=list1

if (list1 == list2):
	print("True")
else:
	print("False")

if (list1 is list2):
	print("True")
else:
	print("False")

if (list1 is list3):
	print("True")
else:
	print("False")

list3 = list3 + list2

if (list1 is list3):
	print("True")
else:
	print("False")

Output: 

True
False
True
False

• The output of the first if the condition is “True” as both list1 and list2 are empty lists.
• Second, if the condition shows “False” because two empty lists are at different memory locations. Hence list1 and list2 refer to different objects. We can check it with id() function in python which returns the “identity” of an object.
• The output of the third if the condition is “True” as both list1 and list3 are pointing to the same object.
• The output of the fourth if the condition is “False” because the concatenation of two lists always produces a new list.

list1 = []
list2 = []

print(id(list1))
print(id(list2))

Output: 

139877155242696
139877155253640

This shows list1 and list2 refer to different objects.