What is difference between '==' and 'is' in python.

Answer 1

the "==" test for value equality . the "is " test for object identity

print(None == None)------(True)
print(None is None)------>(True)

print(True is True)-------> (True)

print([] == [])------->(True)
print([] is [])--------->(False)
print("Python" is "Python")----->(True)

there is only one None and one True object. That is why True is equal and also identical to True. There is only one truth out there, anyway. The empty list [] is equal to another empty list []; but they are not identical. Python has put them into two different memory locations. They are two distinct objects. Hence the is keyword returns False. On the other hand, "Python" is "Python" returns True. This is because of optimization. If two string literals are equal, they have been put to same memory location. A string is an immutable entity and therefore, no harm can be done. it is safe to use the "==" when comparing two things.

Answer 2

for more details on this and more check this link : http://zetcode.com/lang/JUMP_LINK__&&__python__&&__JUMP_LINK/keywords/