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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 delete(self, expected_value=None, return_values=None):
 """ Delete the item from DynamoDB. :type expected_value: dict :param expected_value: A dictionary of name/value pairs that you expect. This dictionary should have name/value pairs where the name is the name of the attribute and the value is either the value you are expecting or False if you expect the attribute not to exist. :type return_values: str :param return_values: Controls the return of attribute name-value pairs before then were changed. Possible values are: None or 'ALL_OLD'. If 'ALL_OLD' is specified and the item is overwritten, the content of the old item is returned. """

        return self.table.layer2.delete_item(self, expected_value,
                                             return_values)