Question

How to find the first non-repeated character in a string with Python

Answer 1

def getFirstNonRepeatedCharacter(s):
    ascii_count = [0] * 256
  
    for i in range (len(s)):
        if (s[i] != ' '):
            ascii_count[ord(s[i])] += 1
        n = i
  
    for i in range(n):
        if (ascii_count[ord(s[i])] == 1):
            return s[i];
  
    return ' '
              
  
  
s = "python programming"
  
ch = getFirstNonRepeatedCharacter(s)

print(ch)
  
  
'''
run:
  
y
  
'''

 

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Answer 2

from collections import Counter

def getFirstNonRepeatedCharacter(s):
    frequency = Counter(s)
 
    for i in s:
        if (frequency[i] == 1):
            return i;
  
    return ' '
              
  
  
s = "python programming"
  
ch = getFirstNonRepeatedCharacter(s)

print(ch)
  
  
  
'''
run:
  
y
  
'''

 

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