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

I don't understand the whole either (what does the main_hook caller look like ?), but i would say, Throw a StopNow exception, when you should stop, just like you should throw StopIteration when your generator is finished.

here is how i understood the thing as well as what i would do.

class StopNow(Exception):
    pass

def main_hook(self,f):
    got_stop_now_exc = False
    while (!got_stop_now_exc and self.shouldContinue()):
        #do some preparations
        try:
             f(self)
        except StopNow:
             got_stop_now_exc = True

        #do some compulsary tear down, exception or not

def stop_and_do_stuff()
    raise StopNow()
def my_f():
    if needed:
        stop_and_do_stuff()

def the_main_hook_caller():
    while i_should:
        managerthingie.main_hook(my_f)
        do_stuff()