Question

How to print all elements of an array (list) only once in Python

Answer 1

def printElementsOnlyOnce(arr): 
    lenn = len(arr); 
    arr.sort(); 

    for i in range(lenn): 
        if (i < lenn - 1 and arr[i] == arr[i + 1]): 
            while (i < lenn - 1 and (arr[i] == arr[i + 1])): 
                i += 1; 
        else: 
            print(arr[i], end=" "); 
 
 
arr = [3, 5, 9, 1, 7, 8, 1, 9, 0, 3, 9, 9, 5, 5, 5];   
 
printElementsOnlyOnce(arr)

 
 
 
'''
run:
  
0 1 3 5 7 8 9
         
'''

 

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