class Sample:
    pass

s1 = Sample()
s1.x = 10
s1.y = 20

print('x = {}, y = {}'.format(s1.x, s1.y))

s2 = Sample()
s2.a = 30
s2.b = 'ali'
s2.c = 12.3

print('a = {}, b = {}, c = {}'.format(s2.a, s2.b, s2.c))