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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 listDatasetChildren(self, dataset):
 """ takes required dataset parameter returns only children dataset name """

        if( dataset == "" ):
            dbsExceptionHandler("dbsException-invalid-input", "DBSDataset/listDatasetChildren. Parent Dataset name is required.")
        conn = self.dbi.connection()
        try:
            result = self.datasetchildlist.execute(conn, dataset)
            return result
        finally:
            if conn:
                conn.close()