from queue import Queue

class Cudo:
    def __init__(self, queue, initial_state):
        self.queue = queue
        self.state = initial_state

    def __call__(self):
        while not queue.empty():
            self.state = queue.get()
        print(self.state)

queue = Queue()

# cudo'll be set initially to these values
cudo = cudo(queue, {'k' : 1, 't_i' : 0, 't_d' : 0})
cudo() # cudo keeps the value
cudo() # nothing changed - cudo keeps old values

queue.put({'k' : 6, 't_i' : 6, 't_d' : 6})
cudo() # cudo prints new values
cudo() # cudo prints same values as above


# value will be ignored by cudo
queue.put({'k' : 1, 't_i' : 2, 't_d' : 3})
# actual value which will be used by cudo
queue.put({'k' : 4, 't_i' : 5, 't_d' : 6})

cudo()
cudo()