Write a python code that Remove duplicates from a list with explanation.
Write a python code that Remove duplicates from a list with explanation.
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23-Apr-2025
Updated on 27-Apr-2025
Khushi Singh
27-Apr-2025When working with lists in Python, you may encounter duplicate elements. Removing these duplicates ensures each item appears only once. A simple and efficient way to remove duplicates is by converting the list into a set, as sets in Python automatically store only unique elements. However, using a set does not preserve the original order of the list.
If maintaining the original order is important, you can use a different approach by iterating through the list, checking if an element has already been seen, and adding it to a new list if it has not. This way, the first occurrence of each element is retained, and duplicates are ignored.
Here’s how both concepts work:
Depending on your requirements (whether you need to maintain the original order or not), you can pick either method.
Below is a Python code example that removes duplicates from a list while maintaining the order. It uses a
setto track seen elements and anew_listto store results.Explanation of Code:
seenkeeps track of elements that have already appeared.unique_list.The output for the above example will be: