def test_separate1():
a, b = separate(range(5), key=lambda n: n < 3)
assert a == [0, 1, 2]
assert b == [3, 4]
def test_separate2():
a, b = separate(range(5))
assert a == [1, 2, 3, 4]
assert b == [0]
def iter_handlers_by_priority(self):
for k in PRIORITIES:
yield separate(self.handlers[k], lambda h: h.asynchronous)