def _tick(self):
		if self.force_fps:
			return 1000.0/self.fps
		else:
			return self.game.clock.tick_busy_loop(self.fps)
Test to get system time
dataset/ETHPy150Open ntasfi/PyGame-Learning-Environment/ple/ple.py/PLE._tick--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/modules/win_system_test.py/WinSystemTestCase.test_get_system_time