%autosave 10

def f(x):
    return x+1, x+2
f(10) == (11, 12)

def f(x):
    yield x+1
    yield x+2
list(f(10)) == [11, 12]

class Callable(object):
    def __call__(self, x):
        return x+1, x+2
Callable()(10) == (11, 12)

def generator(x):
    y = None
    y = yield x+1, y
    y = yield x+1, y

g = generator(10)
print g.next()
print g.send("abc")