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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 create(cls, **kwargs):
 """ Create an instance of this model in the database. Takes the model column values as keyword arguments. Setting a value to `None` is equivalent to running a CQL `DELETE` on that column. Returns the instance. """

        extra_columns = set(kwargs.keys()) - set(cls._columns.keys())
        if extra_columns:
            raise ValidationError("Incorrect columns passed: {0}".format(extra_columns))
        return cls.objects.create(**kwargs)