ValuesHolder.__getitem__() - Code Metrics - Inspection of "Merge pull request #1 from chdemko/master" - thegalactic/py-galactic - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Branch — master (0f5d95)

by Christophe

created 2018-02-04 14:34 UTC

ValuesHolder.getitem() A

↳ Parent: ValuesHolder

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
c	1
b	0
f	0
dl	0
loc	21
rs	9.3142

# This Python file uses the following encoding: utf-8
"""
The :mod:`galactic.context.mixins` package defines mixins classes for defining new types of
contexts:

* :class:`ConcreteIndividual` for defining individuals that own their identifier as a field
* :class:`ConcreteAttribute` for defining attributes that own their name and their type as fields
* :class:`ContextHolder` for defining elements that own their context as a field
* :class:`PopulationHolder` for defining elements that own their population as a field
* :class:`ModelHolder` for defining elements that own their model as a field
* :class:`AttributesHolder` for defining models that own their attributes as a field
* :class:`IndividualsHolder` for defining population that own their individuals as a field
* :class:`ValuesHolder` for defining individuals that own their values as a field

They are widely used for defining

* :class:`MemoryContext <galactic.context.memory.MemoryContext>`
* :class:`MemoryModel <galactic.context.memory.MemoryModel>`
* :class:`MemoryPopulation <galactic.context.memory.MemoryPopulation>`
* :class:`MemoryAttribute <galactic.context.memory.MemoryAttribute>`
* :class:`MemoryIndividual <galactic.context.memory.MemoryIndividual>`

in the :mod:`galactic.context.memory` package.

.. versionadded:: 0.0.1
"""

from typing import Generic, MutableMapping, Iterator

from galactic.context import C, P, M, A, X


# pylint: disable=too-few-public-methods
class _Mixin(object):
    def __init__(self, **_):
        super().__init__()


# pylint: disable=too-few-public-methods,function-redefined
class ConcreteIndividual(_Mixin):
    """
    The :class:`ConcreteIndividual` class is a mixin used in subclassing the
    :class:`Individual <galactic.context.Individual>` class for storing their identifier as a field.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise an individual.

        Keyword Arguments
        -----------------
            identifier : :class:`str`
                the individual identifier

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._identifier = kwargs['identifier']

    @property
    def identifier(self) -> str:
        """
        Get the individual identifier.

        Returns
        -------
            the individual identifier : :class:`str`

        .. versionadded:: 0.0.1
        """
        return self._identifier


# pylint: disable=too-few-public-methods
class ConcreteAttribute(_Mixin):
    """
    The :class:`ConcreteAttribute` class is a mixin used in subclassing the
    :class:`Attribute <galactic.context.Attribute>` class for storing their name and their type
    as a class.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise an attribute

        Keyword Arguments
        -----------------
            name : :class:`str`
                the attribute name

            cls : :class:`type <python:type>`
                the attribute type

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._name = kwargs['name']
        self._type = kwargs['type']

    @property
    def name(self) -> str:
        """
        Get the attribute name.

        Returns
        -------
            the attribute name : :class:`str`

        .. versionadded:: 0.0.1
        """
        return self._name

    @property
    def type(self) -> type:
        """
        Get the attribute type.

        Returns
        -------
            the attribute type : :class:`type <python:type>`

        .. versionadded:: 0.0.1
        """
        return self._type


# pylint: disable=too-few-public-methods
class ContextHolder(_Mixin, Generic[C]):
    """
    The :class:`ContextHolder[C] <ContextHolder>` is a mixin used for storing an element context as
    a field.

    It's a generic class that depends of a :class:`Context <galactic.context.Context>` subclass
    :class:`C`.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise an element by setting its context.

        Keyword Arguments
        -----------------
            context : :class:`C`
                the context

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._context = kwargs['context']

    # noinspection PyTypeChecker
    @property
    def context(self) -> C:
        """
        Get the context.

        Returns
        -------
            the context : :class:`C`

        .. versionadded:: 0.0.1
        """
        return self._context


# pylint: disable=too-few-public-methods
class PopulationHolder(_Mixin, Generic[P]):
    """
    The :class:`PopulationHolder[P] <PopulationHolder>` is a mixin used for storing an element
    population as a field.

    It's a generic class that depends of a :class:`Population <galactic.context.Population>`
    subclass :class:`P`.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise an element by setting its population.

        Keyword Arguments
        -----------------
            population: :class:`P`
                the population

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._population = kwargs['population']

    # noinspection PyTypeChecker
    @property
    def population(self) -> P:
        """
        Get the population.

        Returns
        -------
            the population : :class:`P`

        .. versionadded:: 0.0.1
        """
        return self._population


# pylint: disable=too-few-public-methods
class ModelHolder(_Mixin, Generic[M]):
    """
    The :class:`ModelHolder[M] <ModelHolder>` class is a mixin used for storing an element model as
    a field.

    It's a generic class that depends of a :class:`Model <galactic.context.Model>` subclass
    :class:`M`.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise an element by setting its model.

        Keyword Arguments
        -----------------
            model : :class:`M`
                the model

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._model = kwargs['model']

    # noinspection PyTypeChecker
    @property
    def model(self) -> M:
        """
        Get the model.

        Returns
        -------
            the model : :class:`M`

        .. versionadded:: 0.0.1
        """
        return self._model


# pylint: disable=too-few-public-methods
class AttributesHolder(_Mixin, Generic[A], MutableMapping[str, A]):

    """
    The :class:`AttributesHolder[A] <AttributesHolder>` class is a mixin used for storing the model
    attributes in memory.

    It's a generic class that depends of an :class:`Attribute <galactic.context.Attribute>`
    subclass :class:`A`.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise an attribute holder.

        Keyword Arguments
        -----------------
            attributes : :class:`Iterable[A] <python:collections.abc.Iterable>`
                the attributes

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._attributes = {attribute.name: attribute for attribute in kwargs['attributes']}

    def __getitem__(self, name: str) -> A:
        """
        Get an attribute using its name

        Parameters
        ----------
            name : :class:`str`
                the attribute name

        Returns
        -------
            the attribute : A

        Raises
        ------
            KeyError
                if this attributes holder does not contain an attribute with this name.

        .. versionadded:: 0.0.1
        """
        return self._attributes[name]

    def __setitem__(self, name: str, attribute: A) -> None:
        """
        Set an attribute using its name

        Parameters
        ----------
            name : :class:`str`
                the attribute name
            attribute: :class:`A`

        .. versionadded:: 0.0.1
        """
        self._attributes[name] = attribute

    def __delitem__(self, name: str) -> None:
        """
        Delete an attribute using its name

        Parameters
        ----------
            name : :class:`str`
                the attribute name

        Raises
        ------
            KeyError
                if this attributes holder does not contain an attribute with this name.

        .. versionadded:: 0.0.1
        """
        del self._attributes[name]

    def __iter__(self) -> Iterator[str]:
        """
        Get an iterator over the attribute names.

        Returns
        -------
            an iterator : :class:`Iterator[str] <python:collections.abc.Iterator>`

        .. versionadded:: 0.0.1
        """
        return iter(self._attributes)

    def __len__(self) -> int:
        """
        Get the number of attributes.

        Returns
        -------
            the number of attributes : :class:`int`

        .. versionadded:: 0.0.1
        """
        return len(self._attributes)

    def __bool__(self):
        """
        Get the boolean value of an attribute holder.

        Returns
        -------
            the boolean value : :class:`bool`

        .. versionadded:: 0.0.1
        """
        return bool(self._attributes)


# pylint: disable=too-few-public-methods
class IndividualsHolder(_Mixin, Generic[X], MutableMapping[str, X]):

    """
    The :class:`IndividualsHolder[X] <IndividualsHolder>` class  is a mixin used for storing the
    population individuals in memory.

    It's a generic class that depends of an :class:`Individual <galactic.context.Individual>`
    subclass :class:`X`.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise an individuals holder.

        Keyword Arguments
        -----------------
            individuals : :class:`Iterable[A] <python:collections.abc.Iterable>`
                the individuals

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._individuals = {individual.identifier: individual for individual in
                             kwargs['individuals']}

    def __getitem__(self, identifier: str) -> X:
        """
        Get an individual using its identifier.

        Parameters
        ----------
            identifier : :class:`str`
                the individual identifier

        Returns
        -------
            the individual : :class: `X`

        Raises
        ------
            KeyError
                if the identifier does not belong to the individuals holder.

        .. versionadded:: 0.0.1
        """
        return self._individuals[identifier]

    def __delitem__(self, identifier: str) -> None:
        """
        Delete an individual using its identifier.

        Parameters
        ----------
            identifier : :class:`str`
                the individual identifier

        Raises
        ------
            KeyError
                if the identifier does not belong to the individuals holder.

        .. versionadded:: 0.0.1
        """
        del self._individuals[identifier]

    def __setitem__(self, identifier: str, individual: X) -> None:
        """
        Set an individual using its identifier.

        Parameters
        ----------
            identifier : :class:`str`
                the individual identifier

            individual: :class:`X`
                an individual

        .. versionadded:: 0.0.1
        """
        self._individuals[identifier] = individual

    def __iter__(self) -> Iterator[str]:
        """
        Get an iterator over the individual identifiers.

        Returns
        -------
            an iterator : :class:`Iterator[str] <python:collections.abc.Iterator>`

        .. versionadded:: 0.0.1
        """
        return iter(self._individuals)

    def __len__(self) -> int:
        """
        Get the number of individuals.

        Returns
        -------
            the number of indidivuals : :class:`int`

        .. versionadded:: 0.0.1
        """
        return len(self._individuals)

    def __bool__(self) -> bool:
        """
        Get the boolean representation of the individuals holder.

        Returns
        -------
            the boolean representation : :class:`bool`

        .. versionadded:: 0.0.1
        """
        return bool(self._individuals)


# pylint: disable=too-few-public-methods
class ValuesHolder(_Mixin):
    """
    The :class:`ValuesHolder[A] <ValuesHolder>` class is a mixin for storing the individual values
    in memory.

    It's a generic class that depends of an :class:`Attribute <galactic.context.Attribute>` subclass
    :class:`A`.

    .. versionadded:: 0.0.1
    """

    def __init__(self, **kwargs):
        """
        Initialise a values holder.

        Keyword Arguments
        -----------------
            values : :class:`Mapping[str, object] <python:collections.abc.Mapping>`
                the initial (name, value) pairs

        .. versionadded:: 0.0.1
        """
        super().__init__(**kwargs)
        self._values = {name: value for name, value in kwargs['values'].items()}

    def __getitem__(self, name: str) -> object:
        """
        Get a value using the attribute name.

        Parameters
        ----------
            name : :class:`str`
                the attribute name

        Returns
        -------
            the value : :class:`object`

        Raises
        ------
            KeyError
                if the name does not belong to the values holder.

        .. versionadded:: 0.0.1
        """
        return self._values[name]

    def __setitem__(self, name: str, value) -> None:
        """
        Set the value of an attribute.

        Parameters
        ----------
            name : :class:`str`
                the attribute name
            value : :class:`object`
                the new value

        .. versionadded:: 0.0.1
        """
        self._values[name] = value

    def __delitem__(self, name: str):
        """
        Delete a value using the attribute name.

        Parameters
        ----------
            name : :class:`str`
                the attribute name

        Raises
        ------
            KeyError
                if the name does not belong to the values holder.

        .. versionadded:: 0.0.1
        """
        del self._values[name]


1		# This Python file uses the following encoding: utf-8
2		"""
3		The :mod:`galactic.context.mixins` package defines mixins classes for defining new types of
4		contexts:
5
6		* :class:`ConcreteIndividual` for defining individuals that own their identifier as a field
7		* :class:`ConcreteAttribute` for defining attributes that own their name and their type as fields
8		* :class:`ContextHolder` for defining elements that own their context as a field
9		* :class:`PopulationHolder` for defining elements that own their population as a field
10		* :class:`ModelHolder` for defining elements that own their model as a field
11		* :class:`AttributesHolder` for defining models that own their attributes as a field
12		* :class:`IndividualsHolder` for defining population that own their individuals as a field
13		* :class:`ValuesHolder` for defining individuals that own their values as a field
14
15		They are widely used for defining
16
17		* :class:`MemoryContext <galactic.context.memory.MemoryContext>`
18		* :class:`MemoryModel <galactic.context.memory.MemoryModel>`
19		* :class:`MemoryPopulation <galactic.context.memory.MemoryPopulation>`
20		* :class:`MemoryAttribute <galactic.context.memory.MemoryAttribute>`
21		* :class:`MemoryIndividual <galactic.context.memory.MemoryIndividual>`
22
23		in the :mod:`galactic.context.memory` package.
24
25		.. versionadded:: 0.0.1
26		"""
27
28		from typing import Generic, MutableMapping, Iterator
29
30		from galactic.context import C, P, M, A, X
31
32
33		# pylint: disable=too-few-public-methods
34		class _Mixin(object):
35		def __init__(self, **_):
36		super().__init__()
37
38
39		# pylint: disable=too-few-public-methods,function-redefined
40		class ConcreteIndividual(_Mixin):
41		"""
42		The :class:`ConcreteIndividual` class is a mixin used in subclassing the
43		:class:`Individual <galactic.context.Individual>` class for storing their identifier as a field.
44
45		.. versionadded:: 0.0.1
46		"""
47
48		def __init__(self, **kwargs):
49		"""
50		Initialise an individual.
51
52		Keyword Arguments
53		-----------------
54		identifier : :class:`str`
55		the individual identifier
56
57		.. versionadded:: 0.0.1
58		"""
59		super().__init__(**kwargs)
60		self._identifier = kwargs['identifier']
61
62		@property
63		def identifier(self) -> str:
64		"""
65		Get the individual identifier.
66
67		Returns
68		-------
69		the individual identifier : :class:`str`
70
71		.. versionadded:: 0.0.1
72		"""
73		return self._identifier
74
75
76		# pylint: disable=too-few-public-methods
77		class ConcreteAttribute(_Mixin):
78		"""
79		The :class:`ConcreteAttribute` class is a mixin used in subclassing the
80		:class:`Attribute <galactic.context.Attribute>` class for storing their name and their type
81		as a class.
82
83		.. versionadded:: 0.0.1
84		"""
85
86		def __init__(self, **kwargs):
87		"""
88		Initialise an attribute
89
90		Keyword Arguments
91		-----------------
92		name : :class:`str`
93		the attribute name
94
95		cls : :class:`type <python:type>`
96		the attribute type
97
98		.. versionadded:: 0.0.1
99		"""
100		super().__init__(**kwargs)
101		self._name = kwargs['name']
102		self._type = kwargs['type']
103
104		@property
105		def name(self) -> str:
106		"""
107		Get the attribute name.
108
109		Returns
110		-------
111		the attribute name : :class:`str`
112
113		.. versionadded:: 0.0.1
114		"""
115		return self._name
116
117		@property
118		def type(self) -> type:
119		"""
120		Get the attribute type.
121
122		Returns
123		-------
124		the attribute type : :class:`type <python:type>`
125
126		.. versionadded:: 0.0.1
127		"""
128		return self._type
129
130
131		# pylint: disable=too-few-public-methods
132		class ContextHolder(_Mixin, Generic[C]):
133		"""
134		The :class:`ContextHolder[C] <ContextHolder>` is a mixin used for storing an element context as
135		a field.
136
137		It's a generic class that depends of a :class:`Context <galactic.context.Context>` subclass
138		:class:`C`.
139
140		.. versionadded:: 0.0.1
141		"""
142
143		def __init__(self, **kwargs):
144		"""
145		Initialise an element by setting its context.
146
147		Keyword Arguments
148		-----------------
149		context : :class:`C`
150		the context
151
152		.. versionadded:: 0.0.1
153		"""
154		super().__init__(**kwargs)
155		self._context = kwargs['context']
156
157		# noinspection PyTypeChecker
158		@property
159		def context(self) -> C:
160		"""
161		Get the context.
162
163		Returns
164		-------
165		the context : :class:`C`
166
167		.. versionadded:: 0.0.1
168		"""
169		return self._context
170
171
172		# pylint: disable=too-few-public-methods
173		class PopulationHolder(_Mixin, Generic[P]):
174		"""
175		The :class:`PopulationHolder[P] <PopulationHolder>` is a mixin used for storing an element
176		population as a field.
177
178		It's a generic class that depends of a :class:`Population <galactic.context.Population>`
179		subclass :class:`P`.
180
181		.. versionadded:: 0.0.1
182		"""
183
184		def __init__(self, **kwargs):
185		"""
186		Initialise an element by setting its population.
187
188		Keyword Arguments
189		-----------------
190		population: :class:`P`
191		the population
192
193		.. versionadded:: 0.0.1
194		"""
195		super().__init__(**kwargs)
196		self._population = kwargs['population']
197
198		# noinspection PyTypeChecker
199		@property
200		def population(self) -> P:
201		"""
202		Get the population.
203
204		Returns
205		-------
206		the population : :class:`P`
207
208		.. versionadded:: 0.0.1
209		"""
210		return self._population
211
212
213		# pylint: disable=too-few-public-methods
214		class ModelHolder(_Mixin, Generic[M]):
215		"""
216		The :class:`ModelHolder[M] <ModelHolder>` class is a mixin used for storing an element model as
217		a field.
218
219		It's a generic class that depends of a :class:`Model <galactic.context.Model>` subclass
220		:class:`M`.
221
222		.. versionadded:: 0.0.1
223		"""
224
225		def __init__(self, **kwargs):
226		"""
227		Initialise an element by setting its model.
228
229		Keyword Arguments
230		-----------------
231		model : :class:`M`
232		the model
233
234		.. versionadded:: 0.0.1
235		"""
236		super().__init__(**kwargs)
237		self._model = kwargs['model']
238
239		# noinspection PyTypeChecker
240		@property
241		def model(self) -> M:
242		"""
243		Get the model.
244
245		Returns
246		-------
247		the model : :class:`M`
248
249		.. versionadded:: 0.0.1
250		"""
251		return self._model
252
253
254		# pylint: disable=too-few-public-methods
255	View Code Duplication	class AttributesHolder(_Mixin, Generic[A], MutableMapping[str, A]):
		1 ignored issue – show Duplication introduced 2018-02-04 14:10 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
256		"""
257		The :class:`AttributesHolder[A] <AttributesHolder>` class is a mixin used for storing the model
258		attributes in memory.
259
260		It's a generic class that depends of an :class:`Attribute <galactic.context.Attribute>`
261		subclass :class:`A`.
262
263		.. versionadded:: 0.0.1
264		"""
265
266		def __init__(self, **kwargs):
267		"""
268		Initialise an attribute holder.
269
270		Keyword Arguments
271		-----------------
272		attributes : :class:`Iterable[A] <python:collections.abc.Iterable>`
273		the attributes
274
275		.. versionadded:: 0.0.1
276		"""
277		super().__init__(**kwargs)
278		self._attributes = {attribute.name: attribute for attribute in kwargs['attributes']}
279
280		def __getitem__(self, name: str) -> A:
281		"""
282		Get an attribute using its name
283
284		Parameters
285		----------
286		name : :class:`str`
287		the attribute name
288
289		Returns
290		-------
291		the attribute : A
292
293		Raises
294		------
295		KeyError
296		if this attributes holder does not contain an attribute with this name.
297
298		.. versionadded:: 0.0.1
299		"""
300		return self._attributes[name]
301
302		def __setitem__(self, name: str, attribute: A) -> None:
303		"""
304		Set an attribute using its name
305
306		Parameters
307		----------
308		name : :class:`str`
309		the attribute name
310		attribute: :class:`A`
311
312		.. versionadded:: 0.0.1
313		"""
314		self._attributes[name] = attribute
315
316		def __delitem__(self, name: str) -> None:
317		"""
318		Delete an attribute using its name
319
320		Parameters
321		----------
322		name : :class:`str`
323		the attribute name
324
325		Raises
326		------
327		KeyError
328		if this attributes holder does not contain an attribute with this name.
329
330		.. versionadded:: 0.0.1
331		"""
332		del self._attributes[name]
333
334		def __iter__(self) -> Iterator[str]:
335		"""
336		Get an iterator over the attribute names.
337
338		Returns
339		-------
340		an iterator : :class:`Iterator[str] <python:collections.abc.Iterator>`
341
342		.. versionadded:: 0.0.1
343		"""
344		return iter(self._attributes)
345
346		def __len__(self) -> int:
347		"""
348		Get the number of attributes.
349
350		Returns
351		-------
352		the number of attributes : :class:`int`
353
354		.. versionadded:: 0.0.1
355		"""
356		return len(self._attributes)
357
358		def __bool__(self):
359		"""
360		Get the boolean value of an attribute holder.
361
362		Returns
363		-------
364		the boolean value : :class:`bool`
365
366		.. versionadded:: 0.0.1
367		"""
368		return bool(self._attributes)
369
370
371		# pylint: disable=too-few-public-methods
372	View Code Duplication	class IndividualsHolder(_Mixin, Generic[X], MutableMapping[str, X]):
		1 ignored issue – show Duplication introduced 2018-02-04 14:10 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
373		"""
374		The :class:`IndividualsHolder[X] <IndividualsHolder>` class is a mixin used for storing the
375		population individuals in memory.
376
377		It's a generic class that depends of an :class:`Individual <galactic.context.Individual>`
378		subclass :class:`X`.
379
380		.. versionadded:: 0.0.1
381		"""
382
383		def __init__(self, **kwargs):
384		"""
385		Initialise an individuals holder.
386
387		Keyword Arguments
388		-----------------
389		individuals : :class:`Iterable[A] <python:collections.abc.Iterable>`
390		the individuals
391
392		.. versionadded:: 0.0.1
393		"""
394		super().__init__(**kwargs)
395		self._individuals = {individual.identifier: individual for individual in
396		kwargs['individuals']}
397
398		def __getitem__(self, identifier: str) -> X:
399		"""
400		Get an individual using its identifier.
401
402		Parameters
403		----------
404		identifier : :class:`str`
405		the individual identifier
406
407		Returns
408		-------
409		the individual : :class: `X`
410
411		Raises
412		------
413		KeyError
414		if the identifier does not belong to the individuals holder.
415
416		.. versionadded:: 0.0.1
417		"""
418		return self._individuals[identifier]
419
420		def __delitem__(self, identifier: str) -> None:
421		"""
422		Delete an individual using its identifier.
423
424		Parameters
425		----------
426		identifier : :class:`str`
427		the individual identifier
428
429		Raises
430		------
431		KeyError
432		if the identifier does not belong to the individuals holder.
433
434		.. versionadded:: 0.0.1
435		"""
436		del self._individuals[identifier]
437
438		def __setitem__(self, identifier: str, individual: X) -> None:
439		"""
440		Set an individual using its identifier.
441
442		Parameters
443		----------
444		identifier : :class:`str`
445		the individual identifier
446
447		individual: :class:`X`
448		an individual
449
450		.. versionadded:: 0.0.1
451		"""
452		self._individuals[identifier] = individual
453
454		def __iter__(self) -> Iterator[str]:
455		"""
456		Get an iterator over the individual identifiers.
457
458		Returns
459		-------
460		an iterator : :class:`Iterator[str] <python:collections.abc.Iterator>`
461
462		.. versionadded:: 0.0.1
463		"""
464		return iter(self._individuals)
465
466		def __len__(self) -> int:
467		"""
468		Get the number of individuals.
469
470		Returns
471		-------
472		the number of indidivuals : :class:`int`
473
474		.. versionadded:: 0.0.1
475		"""
476		return len(self._individuals)
477
478		def __bool__(self) -> bool:
479		"""
480		Get the boolean representation of the individuals holder.
481
482		Returns
483		-------
484		the boolean representation : :class:`bool`
485
486		.. versionadded:: 0.0.1
487		"""
488		return bool(self._individuals)
489
490
491		# pylint: disable=too-few-public-methods
492		class ValuesHolder(_Mixin):
493		"""
494		The :class:`ValuesHolder[A] <ValuesHolder>` class is a mixin for storing the individual values
495		in memory.
496
497		It's a generic class that depends of an :class:`Attribute <galactic.context.Attribute>` subclass
498		:class:`A`.
499
500		.. versionadded:: 0.0.1
501		"""
502
503		def __init__(self, **kwargs):
504		"""
505		Initialise a values holder.
506
507		Keyword Arguments
508		-----------------
509		values : :class:`Mapping[str, object] <python:collections.abc.Mapping>`
510		the initial (name, value) pairs
511
512		.. versionadded:: 0.0.1
513		"""
514		super().__init__(**kwargs)
515		self._values = {name: value for name, value in kwargs['values'].items()}
516
517		def __getitem__(self, name: str) -> object:
518		"""
519		Get a value using the attribute name.
520
521		Parameters
522		----------
523		name : :class:`str`
524		the attribute name
525
526		Returns
527		-------
528		the value : :class:`object`
529
530		Raises
531		------
532		KeyError
533		if the name does not belong to the values holder.
534
535		.. versionadded:: 0.0.1
536		"""
537		return self._values[name]
538
539		def __setitem__(self, name: str, value) -> None:
540		"""
541		Set the value of an attribute.
542
543		Parameters
544		----------
545		name : :class:`str`
546		the attribute name
547		value : :class:`object`
548		the new value
549
550		.. versionadded:: 0.0.1
551		"""
552		self._values[name] = value
553
554		def __delitem__(self, name: str):
555		"""
556		Delete a value using the attribute name.
557
558		Parameters
559		----------
560		name : :class:`str`
561		the attribute name
562
563		Raises
564		------
565		KeyError
566		if the name does not belong to the values holder.
567
568		.. versionadded:: 0.0.1
569		"""
570		del self._values[name]
571

thegalactic / py-galactic

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