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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 get(self, key):
 """ This function is here only to provide backwards compatibility in case anyone uses old settings interface. It is strongly encouraged to use dot notation. """

        warnings.warn(
            'The settings.get(key) is superseded by the dot attribute access.',
            PendingDeprecationWarning
        )
        try:
            return getattr(self, key)
        except AttributeError:
            raise ImproperlyConfigured('Missing settings: {}[\'{}\']'.format(
                DJOSER_SETTINGS_NAMESPACE, key)
            )