Remove duplicate elements Python

PROGRAM TO REMOVE THE DUPLICATE ELEMENTS FROM AN ARRAY

def removeDuplicates(arr, n):

    if n == 0 or n == 1:

        return n

  

    # To store index of next

    # unique element

    j = 0

  

    # Doing same as done

    # in Method 1 Just

    # maintaining another 

    # updated index i.e. j

    for i in range(0, n-1):

        if arr[i] != arr[i+1]:

            arr[j] = arr[i]

            j += 1

  

    arr[j] = arr[n-1]

    j += 1

    return j

  

# Driver code

arr = [1, 2, 2, 3, 4, 4, 4, 5, 5]

n = len(arr)

  

# removeDuplicates() returns

# new size of array.

n = removeDuplicates(arr, n)

  

# Print updated array

for i in range(0, n):

    print (" %d "%(arr[i]), end = " ")







OUTPUT: 

1 2 3 4 5

CREDITS: https://www.geeksforgeeks.org/remove-duplicates-sorted-array/