How to get partition info for a partition table?

HI Dear PostgreSQL,

I am pretty new for this DB.
I have created two partition tables as bellow:
*CREATE TABLE* measurement_year_month (
logdate date not null,
peaktemp int,
unitsales int
) PARTITION BY RANGE (EXTRACT(YEAR FROM logdate), EXTRACT(MONTH FROM
logdate));

*create table* partitionTest(
firstname varchar[20],
lastName varchar[20],
id int
)
partition by range (id, firstname);

*My question is:* how do I retrieve the information like bellow?
*Table name* *Partition type * * Partition
information*
measurement_year_month Range (EXTRACT(YEAR FROM
logdate), EXTRACT(MONTH FROM logdate)
partitionTest Range (id,
firstname)

Thanks in advance.

Regards,
Yuxia