Python: how do I sort the numbers in a list and return a two-dimensional list of index values?

problem description

Fast non-dominant scheduling problem

there are two lists as follows:
front = [[]]
n = [2meme 1memo 0je 2je 3jen 000je 0je 2je 5]

first, the indexes with the same value in n, such as n [1] = n [7] = 1scoren [9] = 5, are classified and sorted, and coexist in front

.

result: front = [2jue 5, 6], [1, 7], [0, 3, 8], [4], [9]

Apr.24,2022

   

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b389a0-2b8a4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b389a0-2b8a4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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