Comment by ygrechuk

Why not something like this:

  def f_iter(many, args):
      while True:
          m = f(many, args)
          if m:
              yield m
          else:
              raise StopIteration
  ...
  for m in f_iter(many, args):
      # do stuff with m

This way you’re isolating all the initialization logic, error handling, etc. And you can focus on your domain logic in your client code.