how to sort a list of tuples by two items toghether python

Question

mylist = [('Action',1) , ('Horror',2) , ('Adventure',0) , ('History',2) , ('Romance',1) ,('Comedy',1)]

i have a list of tuples like that:

Action: 1
Horror: 2
Adventure: 0
History: 2
Romance: 1
Comedy: 1

i want to sort this by two elements (name(Alphabetically) & value)

my result should be :

History: 2
Horror: 2
Action: 1
Comedy: 1
Romance: 1
Adventure: 0

David Breen · Accepted Answer · 2018-12-14T12:40:44.003

0

The following should work:

from operator import itemgetter

sorted_list = sorted(mylist, key=itemgetter(0,1), reverse=True)

You can read more about this approach in the "Operator Module Functions" section of this doc: https://wiki.python.org/moin/HowTo/Sorting/

edited Dec 14 '18 at 12:40

answered Dec 14 '18 at 12:01

David Breen

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1
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1

you need `from operator import itemgetter` and yet the result is not what OP wants – buran Dec 14 '18 at 12:09
True, I've made some changes but the answer is still not what the OP wants. Close but not perfect – David Breen Dec 14 '18 at 12:41
but this code that you suggested, doeasn't work – Nima Dec 14 '18 at 12:41

forever_software · Answer 2 · 2018-12-14T14:53:50.507

from collections import defaultdict

mylist = [('Action',1) , ('Horror',2) , ('Adventure',0) , ('History',2) , ('Romance',1) ,('Comedy',1)]

category = defaultdict(list)

for item in mylist:
    category[item[1]].append(item[0])

sorted(category.items())
keylist = category.keys()
for key in sorted(keylist, reverse = True):
    valuelist = category[key]
    valuelist.sort()
    category[key] = valuelist
    for v in valuelist:
        print(str(v),str(key))

Output is below:

History 2
Horror 2
Action 1
Comedy 1
Romance 1
Adventure 0

how to sort a list of tuples by two items toghether python

2 Answers2