x = {1: "A", 3: "B"}
y = {2: "C", 3: "D", 4: "E"}
d = {**x, **y}
vals = sorted(d.values())
print(*vals)

def outer():
    x = "local"
    def inner():
        nonlocal x
        x = "nonlocal"
        print(x, end=" ")
    inner()
    print(x)
outer()

def gen():
    for i in range(3):
        yield i
for item in gen():
    print(item, end=" ")

import itertools
list1 = [1, 2]
list2 = ['a', 'b']
result = list(itertools.product(list1, list2)) 
print(result)

from functools import reduce
class MyList:
    def __init__(self, *args):
        self.items = list(args)

    def __len__(self):
        return reduce(lambda acc, x: acc + (sum(x) if hasattr(x, '__iter__') else x), [x*2 for x in self.items])

my_list = MyList(1, 2, 3, [4, 5])
print(len(my_list))

a = {1, 2, 9}
b = {2, 3, 9}
c = a & b
c.remove(2)
print(*c)

a = {1, 2}
b = {2, 3}
c = (a | b) - (a & b)
d = a ^ b
print(c == d)

a, b = {1, 2}, {2, 3}
c = a - b
d = b - a
print(*(c & d), *(c | d))

my_list = [1, 2, 3, 4, 5]
r = [x % 3 for x in my_list]
print(sum(r))

class A:
    __x = 1
    def f(self):
        return "f from A"
    
    def g(self):
        return "g from A"

class B:
    __x = 2
    def f(self):
        return "f from B"
    
    def g(self):
        return "g from B"

class C(A, B):
    f = B.f
    
c = C()
print(c.f(), c.g(), c._A__x, c._B__x)