Best way to receive the 'return' value from a python generator

Question

Since Python 3.3, if a generator function returns a value, that becomes the value for the StopIteration exception that is raised. This can be collected a number of ways:

Answer 1

A light-weight way to handle the return value (one that doesn't involve instantiating an auxiliary class) is to use dependency injection.

Namely, one can pass in the function to handle / act on the return value using the following wrapper / helper generator function:

def handle_return(generator, func):
    returned = yield from generator
    func(returned)

For example, the following--

def generate():
    yield 1
    yield 2
    return 3

def show_return(value):
    print('returned: {}'.format(value))

for x in handle_return(generate(), show_return):
    print(x)

results in--

1
2
returned: 3