longclaps

class A:
    pass

a = A()
a.x = 1
print(a.x, a.__getattribute__('x'))

a.__setattr__('from', 2) #  вот же идиотизм
print(a.__getattribute__('from'))

with open('input.txt') as fi, open('output.txt', 'w') as fo:
    a, b = int(fi.readline()), int(fi.readline())
    print(a + b, file=fo)

Я бы использовал теорему косинусов

a, b, c = 3, 4, 5
a, b, c = sorted([a, b, c])
if a + b <= c:
    print('impossible')
else:
    t = a * a + b * b - c * c
    print(('right', 'obtuse', 'acute')[(t < 0) - (t > 0)])

print(f'{point!r}')
# на старье ниже 3.6 можно так:
print('%r' % point)

class C:
    def __init__(self, name):
        self.name = name

print(C.__mro__ )
print(isinstance(C('Вася'), object))

from random import randint, choice


def neighbours(cells):
    return {(i, j) for y, x in cells
            for i in range(y - 1, y + 2) for j in range(x - 1, x + 2)}


N = 10  # а вот менять не надо
abc, digits = 'abcdefghij', '0123456789'
field, sea_map = {}, [[' '] * N for _ in range(N)]
for size in 4, 3, 3, 2, 2, 2, 1, 1, 1, 1:
    while True:
        ship = [(randint(0, N - 1), randint(0, N - 1))]
        for _ in range(1, size):
            ship.append(choice([(i, j) for y, x in ship for i, j in (
                (y - 1, x), (y, x - 1), (y, x + 1), (y + 1, x)
            ) if 0 <= i < N > j >= 0 and (i, j) not in ship]))
        if not neighbours(ship) & field.keys():
            break
    field.update(dict.fromkeys(ship, ship))
fleet = set(field)

for step in range(1, 51):  # ограничимся 50ю ходами
    print('    0 1 2 3 4 5 6 7 8 9 \n  ┌─┴─┴─┴─┴─┴─┴─┴─┴─┴─┴─┐')
    for ch, row in zip(abc, sea_map):
        print(ch, '┤', *row, '├', ch)
    print('  └─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┘\n    0 1 2 3 4 5 6 7 8 9')
    s = input(f'{step:>2}  Ваш ход: ')
    try:
        y, x = abc.index(s[0]), digits.index(s[1])
        ship, row = field.get((y, x), ), sea_map[y]
        if ship:
            del field[y, x]
            row[x] = '*'
            print(s, 'Попал\n' if ship & field.keys() else 'Убил\n')
            if not field:
                print('Победа!')
                break
        else:
            if row[x] == ' ':
                row[x] = str(len(fleet & neighbours([(y, x)])))
            print(s, 'Мимо\n')
    except:
        print('Ожидался ход в формате \'a0\', но что-то пошло не так...\n')
else:
    print(f'В этот раз не вышло, в строю осталось {len(field)} палуб '
          f'на {len({id(ship) for ship in field.values()})} кораблях.')

s = "Heeellllo worrldddd уpaaaaa"
print(re.sub(r"(.)\1+", r"\1\1", s))