class MockObject:
    def __new__(cls):
        return 42
        
    def __init__(self):
        print("Init")

obj = MockObject()
print(obj)

def modify(n):
    n = n + 5
    n *= 2
    return n

x = 10
result = modify(x) + x
print(result)

x = [0, 1]
i = 0
i, x[i] = 1, 2
print(x)

a = [[1, 2], [3, 4]]
b = list(a)
a[0][1] = 5
print(b[0][1])

for i in range(2):
    try:
        print(i, end="")
        continue
    finally:
        print("F", end="")

lst = [x for x in range(10) if x % 2 == 0 if x % 3 == 0]
print(lst)

colors = ['red', 'green', 'blue']
colors.insert(1, colors.pop())
colors.reverse()
print(colors[0])

class Model:
    val = 1
    lst = [val for _ in range(3)]

print(Model.lst)

data = {}
data.setdefault("keys", []).append(1)
data.setdefault("keys", []).append(2)
print(data["keys"])

class A:
    x = 1

class B(A):
    pass

class C(A):
    pass

B.x = 2
A.x = 3

print(C.x)