test for mysterious Loop() method

loop test

from __future__ import print_function
import time

done = [False]

class Test(object):
    def __init__(self):
        self.loopfunctions = []

    def SetLoopCallback(self, function):
        self.loopfunctions.append(function)

    def Update(self):
        print('updated')

    def Loop(self, maximum=0):
        i=0
        while not done[0]:
            self.Update()
            for f in self.loopfunctions:
                f(self)
            if maximum: i+=1
            if i > maximum:
                done[0] = True

def dummy(test):
    time.sleep(0.3)

test = Test()
test.SetLoopCallback(dummy)
test.SetLoopCallback(dummy)
test.SetLoopCallback(dummy)

print('entering loop for 5 cycles')
test.Loop(5)
print('done with first loop, entering endless')
done[0] = False
test.Loop()