import functools


def maybe(fn):
    @functools.wraps(fn)
    def wrapper(*args, **kwargs):
        try:
            return fn(*args, **kwargs)
        except Exception:
            return None
    return wrapper


@maybe
def divide(num, den):
    return num / den


def is_just(maybe_val):
    return maybe_val is not None


def is_nothing(maybe_val):
    return maybe_val is None


print(is_just(divide(1, 2)))
print(is_nothing(divide(1, 0)))
print(is_just(divide(1, 0)))
print(is_nothing(divide(1, 2)))