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June 9, 2017 20:07
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Stupid python chaining
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| class ChainableMeta(type): | |
| """this is in no way evil""" | |
| def __getattr__(cls, _): | |
| return Chainable() | |
| class Chainable(object, metaclass=ChainableMeta): | |
| """ | |
| Can we do loads of chained attribute lookups | |
| that always get to the same place? | |
| """ | |
| def __getattribute__(self, _): | |
| return type(self)() | |
| def __call__(self, *args, **kwargs): | |
| return 'spam' | |
| def test_instance(): | |
| """can we call it?""" | |
| assert Chainable()() =='spam' | |
| def test_5th_level(): | |
| """Can we nest it""" | |
| really = Chainable.one.two.three.four.five() | |
| assert really == 'spam' | |
| def test_guess_what_im_using_this_for(): | |
| """Is it production ready?""" | |
| assert Chainable.objects.all() == 'spam' | |
| assert Chainable.objects.filter(a__thing='What') == 'spam' |
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