Output dictionary where each element is a string's character with an index

Question

UPD: inserting from collections import OrderedDict into one of my code cells helped

I want to make a program which accepts a string and then outputs dictionary where each element is this string's character with an index.

Input: hello

Output {'h': 1, 'e': 2, 'l': 3, 'l': 4, 'o': 5}

I've come up with several ways to create this kind of dictionary. However, in every case I have the following output with above-mentioned input: {'e': 2, 'h': 1, 'l': 4, 'o': 5}

#solution 1
s = str(input())
dic = {}
for index, symb in enumerate(s, 1):
  dic[symb]=index
dic

#soultion 2
s = input()
d4 = {}
d4 = dict(zip(s,range(1,len(s)+1)))
d4

What can be an issue here? I will appreciate any help. THanks in advance.

P.S. for coding I use Google Collab

`{'h': 1, 'e': 2, 'l': 3, 'l': 4, 'o': 5}` is not correct. You cannot have duplicates in dict keys ('l' in your case) — IoaTzimas, Oct 20 '20 at 19:25
Also dictionaries are not ordered, so you would not see letters in the iteration order of the string — OneCricketeer, Oct 20 '20 at 19:26
@OneCricketeer See https://stackoverflow.com/questions/39980323/are-dictionaries-ordered-in-python-3-6 — Barmar, Oct 20 '20 at 19:29

score 1 · Accepted Answer · answered Oct 20 '20 at 19:31

1

Dictionaries only allow for one value per key, therefore there won't be two values for the key l, no matter how hard you try. Also, dictionaries are unordered, so the items won't appear in the order they were inserted.

answered Oct 20 '20 at 19:31

Seth

2,214
1
7
21

Mayank Awasthi · Answer 2 · 2020-11-20T21:13:00.263

1

    Simple and Easy:-
    v_str='hello'
    class Dictlist(dict):
    def __setitem__(self, key, value):
        try:
            self[key]
        except KeyError:
            super(Dictlist, self).__setitem__(key, [])
        self[key].append(value)

p_dict=Dictlist()
for i, j in enumerate(v_str):
    p_dict[j]=i
print(p_dict)

# output:-{'h': [0], 'e': [1], 'l': [2, 3], 'o': [4]}

edited Nov 20 '20 at 21:13

answered Oct 20 '20 at 19:40

Mayank Awasthi

79
1
5

Your solution would have the same results that the OP was getting originally. – jonyfries Nov 19 '20 at 20:59
Dictionary doesn't have duplicate keys :) Adding another answer might be helpful – Mayank Awasthi Nov 20 '20 at 21:11
I failed to notice that you were adding them into lists, sorry! – jonyfries Nov 22 '20 at 03:12

score 0 · Answer 3 · answered Oct 20 '20 at 19:33

0

As @IoaTzimas points out correctly in the comments is that you have fundamental misunderstanding of how dict keys work. dict keys must be unique (think like a house key) because the key maps to the value.

answered Oct 20 '20 at 19:33

griffin_cosgrove

419
8
16

Output dictionary where each element is a string's character with an index

3 Answers3