CODEWITHSUNDEEP
pythondictionary
Mix
Mix

Reputation: 117

Python dictionary, adding a new value to key if present multiple times in list

Im trying to split a string of letters into a dictionary which automatically adds the value +1 for every letter present more than once.

The only problem is that my code adds the value +1 for every key...For example if i input: "aasf" the dict will be: a:2, s:2, f:2... Whats wrong??

word = raw_input("Write letters: ")
chars = {}

for c in word:
    chars[c] = c.count(c)
    if c in chars:
        chars[c] += 1
print chars

Upvotes: 2

Views: 536

Answers (2)

warvariuc
warvariuc

Reputation: 59674

Python 2.7.1+ (r271:86832, Apr 11 2011, 18:13:53) 
>>> from collections import Counter
>>> Counter('count letters in this sentence')
Counter({'e': 5, 't': 5, ' ': 4, 'n': 4, 's': 3, 'c': 2, 'i': 2, 'h': 1, 'l': 1, 'o': 1, 'r': 1, 'u': 1})
>>>

Upvotes: 3

dugres
dugres

Reputation: 13103

you must use either 

chars[c] = words.count(c)

OR 

chars[c] += 1

but not both.

Upvotes: 1

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