Sort a list that is embedded

[Whisper40]

Hello, i'm on a personnal project whose objective is to sort a list by name and not by first name.
However i have to keep the couple "name-firstname"

The user has to enter numbers in a list :

 [0, 1]  

These numbers correspond to people who are in this list :

 listepersonnes = [['RIETTE', 'JEAN', 'H', '28'], ['LAPORTE', 'LUCIE', 'H', '38']]

I would like the result to be :

['LAPORTE', 'LUCIE'], ['RIETTE', 'JEAN'] 

I have do it..

listepersonnes = [['RIETTE', 'JEAN', 'H', '28'], ['LAPORTE', 'LUCIE', 'H', '38']]
listetrie = []
for i in range (len(listepersonnes)):
    listetrie.append(listepersonnes[i][0])
    listetrie.sort()
    listetrie.append(listepersonnes[i][1])
 
print(listetrie)

I really don't know how to do it....
I have to do it with function too..

Thanks for help

[Mekire]

I'm not quite clear on what you want the user's input numbers to do.  Could you provide some more detailed input and outputs?

Also:

>>> [person[:2] for person in sorted(listepersonnes)]
[['LAPORTE', 'LUCIE'], ['RIETTE', 'JEAN']]
>>>

[Whisper40]

Hello, sorry i'm french ahah :)
Your code is working correctly but he doesn't do the job i need ;)

 listpeople = [['RIETTE', 'JEAN', 'H', '28'], ['LAPORTE', 'LUCIE', 'H', '38']]
 

INPUT :
I ask to enter number or numbers for example it should do the job for: 0, 2
So I want the code to make sort from the 0 to the 2.

PROGRAM :

I have to make a function ( a definiton ) like this

def sortlist(INPUT):
 ????????????
 ????????????

OUTPUT :
It will sort the name of person like what you did past.

 [['LAPORTE', 'LUCIE'], ['RIETTE', 'JEAN']] 

---

Problem solved ;)with

 "return sorted([i[:2] for i in [maliste[j] for j in selection]])"

[nilamo]

If sorting in-place is fine, then passing the key parameter to .sort is a faster way to do it than sorted().

>>> listpeople = [['RIETTE', 'JEAN', 'H', '28'], ['LAPORTE', 'LUCIE', 'H', '38']]
>>> sort_by = [0, 2]
>>> sort_start, sort_end = sort_by
>>> listpeople.sort(key=lambda person: person[sort_start:sort_end])
>>> listpeople
[['LAPORTE', 'LUCIE', 'H', '38'], ['RIETTE', 'JEAN', 'H', '28']]