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from abc import ABC |
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import attr |
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import copy |
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4
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5
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6
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class DiscretizerInterface(ABC): |
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def discretize(self, *args, **kwargs): |
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raise NotImplementedError |
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10
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11
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class AbstractDiscretizer(DiscretizerInterface): |
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def discretize(self, *args, **kwargs): |
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raise NotImplementedError |
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15
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16
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@attr.s |
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class BaseDiscretizer(AbstractDiscretizer): |
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binner = attr.ib(init=True) |
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@bin.validator |
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def validate_bin_function(self, attribute, value): |
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if not callable(value): |
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raise ValueError(f'Expected a callable object, instead a {type(value).__name__} was given.') |
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def discretize(self, *args, **kwargs): |
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"""Expects args: dataset, feature and kwargs; 'nb_bins'.""" |
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dataset, feature, nb_bins = args[0], args[1], args[2] |
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return self.binner(feature.values(dataset), nb_bins) |
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@attr.s |
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class FeatureDiscretizer(BaseDiscretizer): |
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feature = attr.ib(init=True) |
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def discretize(self, *args, **kwargs): |
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"""Expects args: dataset, nb_bins.""" |
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return super().discretize(args[0], self.feature, args[1]) |
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@attr.s |
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class FeatureDiscretizerFactory: |
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binner_factory = attr.ib(init=True) |
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def categorical(self, feature, **kwargs) -> FeatureDiscretizer: |
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binner_type = 'same-length' |
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if kwargs.get('quantisized', False): |
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binner_type = 'quantisized' |
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return FeatureDiscretizer(self.binner_factory.create_binner(binner_type), feature) |
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def numerical(self, feature, **kwargs) -> FeatureDiscretizer: |
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binner_type = 'same-length' |
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if kwargs.get('quantisized', False): |
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binner_type = 'quantisized' |
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return FeatureDiscretizer(self.binner_factory.create_binner(binner_type), feature) |
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######################################### |
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class BinnerInterface(ABC): |
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def bin(self, values, nb_bins): |
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raise NotImplementedError |
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61
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class BaseBinner(BinnerInterface): |
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def bin(self, values, nb_bins): |
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"""It is assumed numerical (ratio or interval) variable or ordinal (not nominal) categorical variable.""" |
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raise NotImplementedError |
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68
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69
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class BinnerFactory: |
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@classmethod |
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def register_as_subclass(cls, backend_type): |
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def wrapper(subclass): |
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cls.subclasses[backend_type] = subclass |
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return subclass |
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return wrapper |
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@classmethod |
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def create(cls, backend_type, *args, **kwargs): |
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if backend_type not in cls.subclasses: |
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raise ValueError('Bad "BinnerFactory Backend type" type \'{}\''.format(backend_type)) |
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return cls.subclasses[backend_type](*args, **kwargs) |
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def equal_length_binner(self, *args, **kwargs) -> BaseBinner: |
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raise NotImplementedError |
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def quantisized_binner(self, *args, **kwargs) -> BaseBinner: |
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raise NotImplementedError |
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88
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def create_binner(self, *args, **kwargs) -> BaseBinner: |
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raise NotImplementedError |
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91
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boromir674 /
so-magic
