In this tutorial we are going to learn about removing the Duplicate Items from a List in Python.

Python Program to Remove the Duplicate Items from a List

a=[]
n= int(input("Enter the number of elements in list:"))
for x in range(0,n):
    element=int(input("Enter element" + str(x+1) + ":"))
    a.append(element)
b = set()
unique = []
for x in a:
    if x not in b:
        unique.append(x)
        b.add(x)
print("Non-duplicate items:")
print(unique)

Explanation

1. User must enter the number of elements in the list and store it in a variable.
2. User must enter the values of elements into the list.
3. The append function obtains each element from the user and adds the same to the end of the list as many times as the number of elements taken.
4. The for loop basically traverses through the elements of the list and the if statement checks if the element is a duplicate or not.
5. If the element isn’t a duplicate, it is added into another list.
6. The list containing non-duplicate items is then displayed.