def test_picking_a_property_does_not_consume_pipe():
Person = namedtuple('Person', ['age'])
pipe = Pype((Person(n) for n in _123))
next(iter(pipe.pick(Person.age)))
assert tuple(pipe) == (Person(2), Person(3))
def test_picks_items_elements_at_the_given_key():
pipe = Pype(str(n) for n in _123)
assert tuple(pipe.pick(0)) == ('1', '2', '3')
def test_picks_items_property():
Person = namedtuple('Person', ['age'])
pipe = Pype((Person(11), Person(22), Person(33)))
assert tuple(pipe.pick(Person.age)) == (11, 22, 33)
def test_picking_a_key_does_not_consume_pipe():
pipe = Pype(str(n) for n in _123)
next(iter(pipe.pick(0)))
assert tuple(pipe) == ('2', '3')