is_is not

# Checking for None:
result = some_function()
if result is None:
    print("No result")
else:
    print("Result available")

# Comparing Singleton Objects:
status = True
if status is True:
    print("Status is True")

# Caching Immutable Objects:
a = "hello"
b = "hello"
if a is b:
    print("Same object")

# Comparing Custom Objects:
class MyClass:
    pass

obj1 = MyClass()
obj2 = obj1
obj3 = MyClass()

if obj1 is obj2:
    print("obj1 and obj2 refer to the same instance")
if obj1 is not obj3:
    print("obj1 and obj3 are different instances")