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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def deserialize(cls, value, trusted=False, strict=False, assert_valid=False, **kwargs):
 """Create a Singleton instance from a serialized dictionary. This behaves identically to HasProperties.deserialize, except if the singleton is already found in the singleton registry the existing value is used. .. note:: If property values differ from the existing singleton and the input dictionary, the new values from the input dictionary will be ignored """

        if not isinstance(value, dict):
            raise ValueError('HasProperties must deserialize from dictionary')
        identifier = value.pop('_singleton_id', value.get('name'))
        if identifier is None:
            raise ValueError('Singleton classes must contain identifying name')
        if identifier in cls._SINGLETONS:
            return cls._SINGLETONS[identifier]
        value = value.copy()
        name = value.get('name', None)
        value.update({'name': identifier})
        newinst = super(Singleton, cls).deserialize(
            value,
            trusted=trusted,
            strict=strict,
            assert_valid=assert_valid,
            **kwargs
        )
        if name:
            newinst.name = name
        return newinst