# Python’s membership operators test for membership in a sequence, such as strings, lists, or tuples.

a = 20
b = 20
print(" Line 1:", "a =", a, " : ",id(a), "b=", b," : ",id(b))

if ( a is b ):
    print ("Line 2 - a and b have same identity")
else:
    print ("Line 2 - a and b do not have same identity")

if ( id(a) == id(b) ):
    print ("Line 3 - a and b have same identity")
else:
    print ("Line 3 - a and b do not have same identity")

b = 30
print ('Line 4','a=',a,':',id(a), 'b=',b,':',id(b))

if ( a is not b ):
    print ("Line 5 - a and b do not have same identity")
else:
    print ("Line 5 - a and b have same identity")