CODEWITHSUNDEEP
pythondictionarytuples
silentsongs
silentsongs

Reputation: 669

Convert tuple of tuples into dict ---- do not ignore the value when the key has already exist

input:

a = (("s", 3), ("c", 6), ("s", 8))
dict(a)

output:

{"s": 3, "c": 6}

How can I get the following result?

{"s": (3, 8), "c": 6}

Upvotes: 0

Views: 678

Answers (3)

Jon Clements
Jon Clements

Reputation: 142136

Another option is using groupby (although I'd go defaultdict) which means you can be left with tuples fairly easily if you need them:

from itertools import groupby
from operator import itemgetter as ig

a = (("s", 3), ("c", 6), ("s", 8))    
newdict = { k:tuple(map(ig(1), v)) for k, v in groupby(sorted(a), ig(0)) }

Upvotes: 2

jamylak
jamylak

Reputation: 133534

>>> from collections import defaultdict
>>> a = (("s", 3), ("c", 6), ("s", 8))
>>> d = defaultdict(list)
>>> for c, num in a:
        d[c].append(num)


>>> d
defaultdict(<type 'list'>, {'s': [3, 8], 'c': [6]})

Upvotes: 3

Ashwini Chaudhary
Ashwini Chaudhary

Reputation: 250921

use setdefault() and c should be a list:

>>> a = (("s",3), ("c",6), ("s",8))
>>> dic={}
>>> for x in a:
    dic.setdefault(x[0],[]).append(x[1])


>>> dic
{'s': [3, 8], 'c': [6]}

Upvotes: 2

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