a =  3.1 
b =  3.1 

print('a == b -> ', a == b)
print('a is b -> ', a is b)

print('\n----------------------\n')
a =  3.1*2 
b =  3.1*2 

print('a == b -> ', a == b)
print('a is b -> ', a is b)

print('\n----------------------\n')

L = [1,2,3]
M = [1,2,3]

print('L == M -> ', L == M)
print('L is M -> ', L is M)