How to create a dictionary from a string in python [duplicate]

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?

adrtam · Accepted Answer · 2020-08-16 05:39:55Z

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, 2020 at 5:39

adrtam

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Comments

kesarling · Accepted Answer · 2020-08-16 05:43:51Z

0

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

answered Aug 16, 2020 at 5:43

kesarling

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planben · Accepted Answer · 2020-08-16 05:54:27Z

-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)

answered Aug 16, 2020 at 5:48

planben

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@OP This is called dictionary comprehension.

This is unecessarily quadratic time

This is O(N**2) when it can be done in O(N) trivially. Don't use .count in a loop