Question

How to print characters that have even frequencies of occurrence in a string with Python

Answer 1

def print_even_frequencies_char(s): 
  
    letters = [0] * 256 

    for i in range(0, len(s)): 
        if (s[i].isalpha()):
            letters[ord(s[i])] += 1

    for i in range(0, 256):  
        if (letters[i] != 0 and letters[i] % 2 == 0): 
            print(chr(i), letters[i]) 



s = "python programming pro oo"; 
          
print_even_frequencies_char(s);


'''
run:

g 2
m 2
n 2

'''

 

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