invoking yield for a generator in another function

Question

suppose I have some manager object. This object\'s API has a main_hook function, that gets another function f as it\'s argument, and runs the given

Answer 1

My previous answer describes how to do this in Python2, which is very ugly. But now I ran across PEP 380: Syntax for Delegating to a Subgenerator. That does exactly what you ask. The only problem is that it requires Python3. But that shouldn't really be a problem.

Here's how it works:

def worker():
    yield 1
    yield 2
    return 3

def main():
    yield 0
    value = yield from worker()
    print('returned %d' % value)
    yield 4

for m in main():
    print('generator yields %d' % m)

The result of this is:

generator yields 0
generator yields 1
generator yields 2
returned 3
generator yields 4

Exceptions are passed through the way you would expect.