| class Every: | |
| def __init__(self, every): | |
| self._every = every | |
| self._last = None | |
| def __call__(self, step): | |
| step = int(step) | |
| if not self._every: | |
| return False | |
| if self._last is None: | |
| self._last = step | |
| return True | |
| if step >= self._last + self._every: | |
| self._last += self._every | |
| return True | |
| return False | |
| class Once: | |
| def __init__(self): | |
| self._once = True | |
| def __call__(self): | |
| if self._once: | |
| self._once = False | |
| return True | |
| return False | |
| class Until: | |
| def __init__(self, until): | |
| self._until = until | |
| def __call__(self, step): | |
| step = int(step) | |
| if not self._until: | |
| return True | |
| return step < self._until | |