Created
October 28, 2010 09:41
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Populates all classes with "altitude", measured as the number of lines from the bottom of the file. And the very useful "fly" function
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| import inspect | |
| class GravitationalError(Exception): | |
| pass | |
| class Fly(object): | |
| def __get__(self, instance=None, owner=None): | |
| def fly(*args, **kwargs): | |
| alt_str = "Flying at the height of %d lines. " % owner.altitude | |
| members = inspect.getmodule(owner).__dict__.values() | |
| lst = [(m, m.altitude) for m in members if inspect.isclass(m)] | |
| pos_str = "All alone here" | |
| if len(lst) > 1: | |
| ordered = [x[0] for x in sorted(lst,key=lambda x: x[1])] | |
| pos = ordered.index(owner) | |
| if pos == 0: | |
| pos_str = 'At the very bottom, below the "%s"' % \ | |
| ordered[pos+1].__name__ | |
| elif pos == len(ordered)-1: | |
| pos_str = 'At the very top, above the "%s"' % \ | |
| ordered[pos-1].__name__ | |
| else: | |
| pos_str = 'Between "%s" and "%s"' %\ | |
| (ordered[pos-1].__name__, ordered[pos+1].__name__) | |
| return alt_str + pos_str + ". It's all Python! (http://xkcd.com/353/)" | |
| return fly | |
| class Altitude(object): | |
| def __get__(self, instance=None, owner=None): | |
| height = len(inspect.getsourcelines(inspect.getmodule(owner))[0]) | |
| return height - inspect.getsourcelines(owner)[1] | |
| def __set__(self, instance, value): | |
| raise GravitationalError("This is not how you're supposed to fly") | |
| def levitate_all(): | |
| frame_globals = inspect.currentframe().f_back.f_back.f_globals | |
| for cls in [val for val in frame_globals.values() if inspect.isclass(val)]: | |
| cls.fly = Fly() | |
| cls.altitude = Altitude() | |
| levitate_all() |
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