Remove Duplicates from List
Remove duplicate elements from a list while preserving order.
BeginnerTopic: List Programs
Python Remove Duplicates from List Program
This program helps you to learn the fundamental structure and syntax of Python programming.
# Program to remove duplicates from a list while preserving order
items = input("Enter list elements separated by space: ").split()
seen = set()
result = []
for x in items:
if x not in seen:
seen.add(x)
result.append(x)
print("List without duplicates:", result)Output
Enter list elements separated by space: 1 2 2 3 1 List without duplicates: ['1', '2', '3']
Understanding Remove Duplicates from List
We track seen elements in a set and only append new items to the result list to keep the first occurrence.
Note: To write and run Python programs, you need to set up the local environment on your computer. Refer to the complete article Setting up Python Development Environment. If you do not want to set up the local environment on your computer, you can also use online IDE to write and run your Python programs.