d = {'a': 1, 'b': 2, 'c': 3}
try:
    for k in d:
        del d[k]
    print(len(d))
except RuntimeError:
    print("RuntimeError")

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

def f(x, y, z):
    return x + y + z

d1 = {'x': 1, 'y': 2}
d2 = {'y': 3, 'z': 4}

try:
    print(f(**d1, **d2))
except TypeError:
    print("TypeError")

print((1, 2) < (1, 2, -1))

def modify(x, y=[]):
    y.append(x)
    return sum(y)

result = modify(5) + modify(7) + modify(4)
print(result)

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

print(A())

class A:
    def __init__(self):
        self.__x = 1
        
    def get_x(self):
        return self.__x

class B(A):
    def __init__(self):
        super().__init__()
        self.__x = 2

b = B()
print(b.get_x())

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

def modify(x, y=[]):
    y.append(x)
    return sum(y)

result = modify(5) + modify(7) + modify(4)
print(result)

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