How to create a dictionary from a string in python

Question

my_str = 'wednesday'

Output should be

d = {'w':1,'e':2,'d':2,'n':1,'s':1,'y':1,'a':1}

Is there any direct inbuilt function?

Please show your code – kesarling He-Him Aug 16 '20 at 05:39 — kesarling He-Him, Aug 16 '20 at 05:39
See https://docs.python.org/2/library/collections.html – balderman Aug 16 '20 at 05:40 — balderman, Aug 16 '20 at 05:40

score 7 · Answer 1 · answered Aug 16 '20 at 05:39

7

>>> import collections
>>> s = 'wednesday'
>>> collections.Counter(s)
Counter({'e': 2, 'd': 2, 'w': 1, 'n': 1, 's': 1, 'a': 1, 'y': 1})

answered Aug 16 '20 at 05:39

adrtam

score 0 · Answer 2 · answered Aug 16 '20 at 05:43

0

string = "wednesday"
dic = dict()
for character in string:
  dic[character] = dic.get(character, 0) + 1
print (dic)

answered Aug 16 '20 at 05:43

kesarling He-Him

planben · Answer 3 · 2020-08-16T05:54:27.233

-2

You can use the dictionary comprehension, as explained in this answer : Python Dictionary Comprehension

my_str = 'wednesday'
d = { ch:(my_str.count(ch)) for ch in my_str }
print(d)

edited Aug 16 '20 at 05:54

answered Aug 16 '20 at 05:48

planben

1

@OP This is called dictionary comprehension. – kesarling He-Him Aug 16 '20 at 05:50
This is unecessarily quadratic time – juanpa.arrivillaga Aug 16 '20 at 05:57
This is O(N**2) when it can be done in O(N) trivially. Don't use `.count` in a loop – juanpa.arrivillaga Aug 16 '20 at 06:02

3 Answers3