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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 insert( self, table_name, obj=None, database=None, overwrite=False, partition=None, values=None, validate=True, ):
 """ Insert into existing table. See ImpalaTable.insert for other parameters. Parameters table_name : string database : string, default None Examples -------- # Completely overwrite contents """

        table = self.table(table_name, database=database)
        return table.insert(
            obj=obj,
            overwrite=overwrite,
            partition=partition,
            values=values,
            validate=validate,
        )