example_gen_coro.py

from types import coroutine


@coroutine
def spam():
    result = yield 'somevalue'
    print("Got it:", result)


async def foo():
    print('Start foo')
    await spam()
    print('End foo')


if __name__ == '__main__':
    ret = None
    f = spam()
    while 1:
        try:
            ret = f.send(ret)
        except StopIteration:
            break
    print('#' * 20)
    print('Testing foo...')
    print('#' * 20)
    ret = None
    f = foo()
    while 1:
        try:
            ret = f.send(ret)
        except StopIteration:
            break