Question

How to remove odd frequency characters from a string in Python

Answer 1

def remove_odd_frequency_characters(s): 
    d = dict() 
    for i in range(len(s)): 
        if s[i] in d: 
            d[s[i]] = d[s[i]] + 1
        else: 
            d[s[i]] = 1

    new_string = "" 

    for i in range(len(s)): 
        if d[s[i]] % 2 != 0: 
            continue

        new_string = new_string + s[i] 
          
    return new_string
      

if __name__=='__main__': 
    s = "python programming version 3.2"

    new_string = remove_odd_frequency_characters(s) 
    
    print(new_string)
    
    
'''
run:

ppgmmigi

'''

 

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