sort a list of tuples

Question

I have a list of tuples "degree"

[('WA', 2), ('DE', 3), ('DC', 2), ('WI', 4), ('WV', 5), ('FL', 2), ('WY', 6), ('NH', 3), ('NJ', 3), ('NM', 4), ('TX', 4), ('LA', 3), ('NC', 4), ('ND', 3), ('NE', 6), ('TN', 8), ('NY', 5), ('PA', 6), ('RI', 2), ('NV', 5), ('VA', 6), ('CO', 6), ('CA', 3), ('AL', 4), ('AR', 6), ('VT', 3), ('IL', 5), ('GA', 5), ('IN', 4), ('IA', 6), ('MA', 5), ('AZ', 4), ('ID', 6), ('CT', 3), ('ME', 1), ('MD', 5), ('OK', 6), ('OH', 5), ('UT', 5), ('MO', 8), ('MN', 4), ('MI', 3), ('KS', 4), ('MT', 4), ('MS', 4), ('SC', 2), ('KY', 7), ('OR', 4), ('SD', 6)]

I want to sort the tuple from lowest to highest (by number, not by state) so lt looks like :

[('ME', 1),....,('MO', 8)]

I tried this but it does not work, how can i fix it?

print sorted(degree)

@Amith Please do not use backticks for anything except code, thanks! — , Mar 24 '14 at 05:28
possible duplicate of [Sort a list of tuples by 2nd item (integer value)](http://stackoverflow.com/questions/10695139/sort-a-list-of-tuples-by-2nd-item-integer-value) — Deepak Ingole, Mar 24 '14 at 05:28
This is exact duplicate. Why don't you ask Google first? https://www.google.ru/search?q=sort+list+of+tuples+by+second+element+python — oxfn, Mar 24 '14 at 05:35

Arovit · Answer 1 · 2014-03-24T05:33:06.293

3

Try this -

sorted(degree, key=lambda (k,v): v)

edited Mar 24 '14 at 05:33

answered Mar 24 '14 at 05:27

Arovit

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Nope. Should be `lambda (k,v): v` – oxfn Mar 24 '14 at 05:30

score 2 · Answer 2 · answered Mar 24 '14 at 05:32

2

from operator import itemgetter
sorted(degree, key=itemgetter(1))

answered Mar 24 '14 at 05:32

Aidan

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score 1 · Answer 3 · answered Mar 24 '14 at 05:30

You can try using sorted() which will return a new sorted list. We are passing an optional argument, key. Here, we are using a lambda function. sorted() will base its result in the function passed, which will evaluate each element. For example, for the first element:

('WA', 2)   # x

the function will return x[1]. In other words, 2. Similarly for other elements.

print sorted(degree, key = lambda x : x[1])

score 0 · Answer 4 · answered Mar 24 '14 at 05:37

0

Try this

def comp(x,y):
    return x[1] - y[1]

degree.sort(comp)

answered Mar 24 '14 at 05:37

ami_GS

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sort a list of tuples

4 Answers4