Python iterable Queue

Question

I need to know when a Queue is closed and wont have more items so I can end the iteration.

I did it by putting a sentinel in the queue:

from Queue import         


        

Answer 1

A sentinel is a reasonable way for a producer to send a message that no more queue tasks are forthcoming.

FWIW, your code can be simplified quite a bit with the two argument form of iter():

from Queue import Queue

class IterableQueue(Queue): 

    _sentinel = object()

    def __iter__(self):
        return iter(self.get, self._sentinel)

    def close(self):
        self.put(self._sentinel)