Reference library

Lists & loops

Iterate, transform, and combine sequences with readable loop patterns.

1 match
Lists & loops easy

How to Get the Union of Two Lists Without Duplicates in Python

Merge two lists and remove duplicate values using a set, then convert back to a list.

set union merge
Python 
def union_without_duplicates(list1, list2):
    return list(set(list1 + list2))

if __name__ == "__main__":
    list_a = [1, 2, 3, 4]
    list_b = [3, 4, 5, 6]
    result = union_without_duplicates(list_a, list_b)
    print(f"Union of {list_a} and {list_b}: {result}")
13 0 Open

Browse by section

Each section groups closely related Python snippets.

Lists & loops — Python code examples

What you will find here

This page collects lists & loops snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.

Samples vs tutorials and challenges

Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.

Related coding tools

Free online Python IDE Write and run Python in your browser — no install. Free Python code formatter Format with autopep8 — side-by-side PEP 8 cleanup. Python code samples Copy-ready snippets to study and run in the IDE.