t = (1, 2, [3, 4])
d = {}
try:
    d[t] = "success"
    print(d[t])
except TypeError:
    print("TypeError")

d1 = {'a': 1, 'b': 2}
d2 = {'b': 3, 'c': 4}
print(d1 | d2)

x = "global"
res = [x for x in ["local", "scope"]]
print(x)

funcs = []
for i in range(3):
    funcs.append(lambda x=i: x)

print([f() for f in funcs])

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

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())

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")

gen = (x for x in range(3))
list(gen)
print(list(gen))

def add_item(num, lst=[]):
    lst.append(num)
    return lst

add_item(1)
print(add_item(2))

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

obj = MockObject()
print(obj)