a = {1: "London", 3: "Berlin"}
b = {2: "New York", 3: "Moscow", 4: "Geneva"}

c = {**a, **b}
print(c)

import numpy as np
matrix_a = np.array([
    [1, 1, 1],
    [1, 1, 1],
    [1, 1, 2]
])
matrix_b = np.array([
    [1, 3, 1],
    [1, 3, 1],
    [1, 3, 8]
])
с = matrix_a + matrix_b
print(с)

c = map(lambda x: x + x, filter(lambda x: x>3, (1, 2, 3, 4)))
print(list(c))

import numpy as np
a = np.array([1, 2, 3])
print(np.dot(a, a.T))

c = filter(lambda x: x>=3, map(lambda x: x+x, (1, 2, 3, 4)))
print(list(c))

def unpacking(x, y, z):
    print(x, y, z, end=" ")
tuple_vec = (1, 0, 1)
dict_vec = {'x': 1, 'y': 0, 'z': 1}
unpacking(*tuple_vec)
unpacking(**dict_vec)

7//3 + 7//-3

class B:
    def __init__(self):
        self.arr = []
    def __getattr__(self, attrname):
        return getattr(self.arr, attrname)
    
b = B()
b.append(1)
b.append(2)
b.append(3)
b.pop()
print(b.arr)

",".join(['1', '2', '3', '4'])

print(type(type(bool(1))))