sort nested list data in python

Question

I am trying to sort a nested list in python(3.8.5). I have a list like -

[['1', 'A', 2, 5, 45, 10],
 ['2', 'B', 8, 15, 65, 20],
 ['3', 'C', 32, 35, 25, 140],
 ['4', 'D', 82, 305, 75, 90],
 ['5', 'E', 39, 43, 89, 55],
 ]

and I want to sort like this -

[['4', 'D', 82, 305, 75, 90],
 ['5', 'E', 39, 43, 89, 55],
 ['3', 'C', 32, 35, 25, 140],
 ['2', 'B', 8, 15, 65, 20],
 ['1', 'A', 2, 5, 45, 10],
 ]

it has sorted by column with index 2. and more like this according to index. start with index 2 and so on. I mean it has sorted according to columns. so could I do this.

dimay · Accepted Answer · 2021-01-12 06:49:24Z

11

Try this:

lst = [['1', 'A', 2, 5, 45, 10],
 ['2', 'B', 8, 15, 65, 20],
 ['3', 'C', 32, 35, 25, 140],
 ['4', 'D', 82, 305, 75, 90],
 ['5', 'E', 39, 43, 89, 55],
 ]

lst = sorted(lst, key=lambda x: x[2], reverse=True)
print(lst)

answered Jan 12, 2021 at 6:49

dimay

2,8341 gold badge17 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

M Z · Accepted Answer · 2021-01-12 06:49:44Z

2

If you want to sort a list like that, just give sorted a key:

sorted_list = sorted([['1', 'A', 2, 5, 45, 10],
     ['2', 'B', 8, 15, 65, 20],
     ['3', 'C', 32, 35, 25, 140],
     ['4', 'D', 82, 305, 75, 90],
     ['5', 'E', 39, 43, 89, 55]], key=lambda lst: lst[2], lst[1], ....)

For numerical values, you can even include a negative sign (-lst[1]) to reverse the ordering for an individual column

answered Jan 12, 2021 at 6:49

M Z

4,8392 gold badges15 silver badges28 bronze badges

1 Comment

M Z Over a year ago

@dimay Not necessarily. I'm confused as to the order that OP wants. But I've given the option to reverse per column using a negation

Vivek Bhoye · Accepted Answer · 2022-05-11 20:55:56Z

1

Code to sort the tuples using second element of sub-list in-place way to sort using sort():

def sort(sub_li): 
    # reverse = None (Sorts in Ascending order) 
    # key is set to sort using second element of 
    # sublist lambda has been used 
    sub_li.sort(key = lambda x: x[2],reverse=True) 
    return sub_li 

# Driver Code 
sub_li =[['1', 'A', 2, 5, 45, 10],
    ['2', 'B', 8, 15, 65, 20],
    ['3', 'C', 32, 35, 25, 140],
    ['4', 'D', 82, 305, 75, 90],
    ['5', 'E', 39, 43, 89, 55],
    ]
print(Sort(sub_li))

edited May 11, 2022 at 20:55

user17242583

answered Jan 12, 2021 at 6:54

Vivek Bhoye

487 bronze badges

Collectives™ on Stack Overflow

sort nested list data in python

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related