micropython/tests/basics/gen_yield_from_iter.py

def gen():
    yield from (1, 2, 3)

def gen2():
    yield from gen()

def gen3():
    yield from (4, 5)
    yield 6

print(list(gen()))
print(list(gen2()))
print(list(gen3()))
py: Implement support for generalized generator protocol. Iterators and ducktype objects can now be arguments of yield from. 2014-03-30 20:14:55 +00:00			`def gen():`
			`yield from (1, 2, 3)`

			`def gen2():`
			`yield from gen()`

py: iternext() may not return MP_OBJ_NULL, only MP_OBJ_STOP_ITERATION. Testing for incorrect value led to premature termination of generator containing yield from for such iterator (e.g. "yield from [1, 2]"). 2015-05-09 21:41:34 +00:00			`def gen3():`
			`yield from (4, 5)`
			`yield 6`

py: Implement support for generalized generator protocol. Iterators and ducktype objects can now be arguments of yield from. 2014-03-30 20:14:55 +00:00			`print(list(gen()))`
			`print(list(gen2()))`
py: iternext() may not return MP_OBJ_NULL, only MP_OBJ_STOP_ITERATION. Testing for incorrect value led to premature termination of generator containing yield from for such iterator (e.g. "yield from [1, 2]"). 2015-05-09 21:41:34 +00:00			`print(list(gen3()))`