Задачи по Python и машинному обучению. Страница 3

from functools import reduce
y = reduce(lambda a, b: a + b , [1, 2, 3, 4])
print(y)

def f():
    import sys
    locs = sys._getframe(1).f_locals
    setattr(locs['self'], 'xy', 4*locs['x'] + 7*locs['y'])

class A:
    def __init__(self, x, y):
        self.xy = 2*x + 3*y
        f()

a = A(2, 3)
A.xy = 99
print(a.xy)

def f(x):
    if x < 3:
        return x
y = filter(f, (0, 1, 2, 3, 4))
print(list(y))

def func(x):
    if x >= 3:
        return x
y = filter(func, (1, 2, 3, 4))
print(list(y))

x = 5
print([y%2 for y in range(6)][x])

tup = (5, 7, 22, 97)
newtup = tuple(map(lambda x: x + 3, tup))
print(newtup)

def f(p, q):
    return p + q

x = list(map(f, ('a', 'b', 'c'), ('x', 'y', 'z')))
print(x[1])

s = list(map(lambda x, y: x + y, [1, 2, 3], [4, 5, 6]))
print(s)

s = list(map(lambda x: x * x, (1, 2, 3, 4)))
print(s)

name = {
    124: "A",
    444: "B",
    952: "C"}
user_id = 375
print(name.get(user_id, "D"))

print((lambda x: print("hello", end="") or x*2)("hi"))

3^2

x = 5
print([y//2 for y in range(6)][x])

d = {1: 'first', 2: 'second'}
d[4] = None
print(len(d))

a = [1, 5, 7]
b = [2, 4, 6]
c = a.extend(b)
print(c)