Feature Request: implement a general purpose call back method

[snowch]

It would be good to have a call back method that is just executed on each poll.

def after_each_poll(response):
    print('.')

polling.poll(
    lambda: requests.put('http://mysite.com/api/user', data={'username': 'Jill'},
    after_each_poll=after_each_poll,
    step=1,
    timeout=10)

[manvillej]

a bit of a work around, but you can get similar functionality with just a bit of abstraction around the collect_values.

def after_each_poll(response):
    print('.')

class CallBackQueue(Queue):
	"""calls the function when values are added to the queue"""
	def __init__(self, func):
		super(CallBackQueue, self).__init__()
		self.callback_func = func

	def put(response):
		self.func(response)
		Queue.put(response)

polling.poll(
    lambda: requests.put('http://mysite.com/api/user', data={'username': 'Jill'},
    after_each_poll=after_each_poll,
    step=1,
    collect_values = CallBackQueue(func=after_each_poll)
    timeout=10)

it works because of this line: https://github.com/justiniso/polling/blob/master/polling.py#L115

If you do not want to add the queue. simply do not extend the queue in your class.

class CallBackAbstraction(Object):
	"""calls the function when values are added to the queue"""
	def __init__(self, func):
		super(CallBackAbstraction, self).__init__()
		self.callback_func = func

	def put(response):
		self.func(response)

[manvillej]

alternatively, you could also do it at the check_success function: check the value, do your stuff, and then return a boolean.