Server Administration :: How To Check A Partition Have Been Compressed

How can i check a partition whether it has been compressed? just as flowing test,i can not get the information about partition P_L1 whether been compressed.

SQL> Select
2 aa.compression,
3 aa.partition_name
4 From dba_tab_partitions aa
5 Where aa.table_name = 'TB_HXL_LIST';

COMPRESS PARTITION_NAME
-------- ------------------------------
DISABLED P_L1
DISABLED P_L2
DISABLED P_L3
DISABLED P_L4

SQL> Alter Table tb_hxl_list compress;

Table altered.

SQL> Alter Table TB_HXL_LIST
2 Move Partition P_L1 compress;

Table altered.

SQL> Select
2 aa.compression,
3 aa.partition_name
4 From dba_tab_partitions aa
5 Where aa.table_name = 'TB_HXL_LIST';

COMPRESS PARTITION_NAME
-------- ------------------------------
ENABLED P_L1
ENABLED P_L2
ENABLED P_L3
ENABLED P_L4