# class with __init__
class C1:
def __init__(self):
self.x = 1
c1 = C1()
print(type(c1) == C1)
print(c1.x)
class C2:
def __init__(self, x):
self.x = x
c2 = C2(4)
print(type(c2) == C2)
print(c2.x)