class A:
    def __call__(self):
        return self
a = A()
print(a is a(), a() == a()())

from decimal import Decimal, ROUND_UP, ROUND_DOWN
a = Decimal(1)
b = Decimal(7)
c = a / b
x1 = c.quantize(Decimal('0.1'), rounding=ROUND_DOWN)
x2 = c.quantize(Decimal('0.1'), rounding=ROUND_UP)
print(x2 - x1)

def dec(f):
  # Ваш код...
  def wrapper(*args, **kwargs):
    return f(*args, **kwargs)
  return wrapper

@dec
def add(a, b):
  return a + b

print(add.__name__)

import pickle
s = pickle.dumps({"x": 1})
a = pickle.loads(s[1:])["x"]
print(a)

import struct
s = struct.pack('fhb', 1, 1, 1)
print(len(s))

a, *b = (1, 2, 3)
x = hasattr(a, '__iter__')
y = hasattr(b, '__iter__')
print(x, y)

it = (lambda: i for i in [1, 2])
vals = [f() for f in it]
print(sum(vals))

it = (lambda: i for i in [1, 2])
vals = [f() for f in [*it]]
print(sum(vals))