1from inspect import isfunction
 2
 3
 4def logic_mixin_factory(mass, mass_attr_name, material, material_attr_name, float_method_name):
 5    def error_handler(error):
 6        def handler(func):
 7            def decorator(*args, **kwargs):
 8                try:
 9                    return func(*args, **kwargs)
10                except error:
11                    return False
12            return decorator
13        return handler
14
15    class WitchMixin:
16
17        @error_handler(AttributeError)
18        def _light_as_duck(self):
19            return getattr(self, mass_attr_name) == mass
20
21        @error_handler(AttributeError)
22        def _burns_like_wood(self):
23            return getattr(self, material_attr_name) == material
24
25        @error_handler(AttributeError)
26        def _floats_like_duck(self):
27            return isfunction(getattr(self, float_method_name))
28
29        def is_a_witch(self):
30            if self._light_as_duck() or self._burns_like_wood() or self._floats_like_duck():
31                return 'Burn her!'
32            return 'No, but it\'s a pity, cuz she looks like a witch!'
33    return WitchMixin
34
35
36# logic_mixin_factory = lambda m, m_a, w, w_a, f: type('WitchMixin', (), {'is_a_witch': lambda _: ("No, but it's a pity, cuz she looks like a witch!", "Burn her!")[getattr(_, m_a, None) == m or getattr(_, w_a, None) == w or isfunction(getattr(_, f, None))]})