def default_values(self) -> Dict[str, Any]:
        "``{column_name: default_value}`` dictionary of default values for columns in this table."
        return {
            column.name: _decode_default_value(column.default_value)
            for column in self.columns
            if column.default_value is not None
        }
``{column_name: default_value}`` dictionary of default values for columns in this table.
sqlite_utils/db.py