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How do you remove duplicates from a list in Python?
To remove duplicates from a List in Python, we can use various ways as discussed in this article.
Remove duplicates from a list using Dictionary
Example
In this example, we will remove duplicates from a list using OrderedDict −
from collections import OrderedDict # Creating a List with duplicate items mylist = ["Jacob", "Harry", "Mark", "Anthony", "Harry", "Anthony"] # Displaying the List print("List = ",mylist) # Remove duplicates from a list using dictionary resList = OrderedDict.fromkeys(mylist) # Display the List after removing duplicates print("Updated List = ",list(resList))
Output
List = ['Jacob', 'Harry', 'Mark', 'Anthony', 'Harry', 'Anthony'] Updated List = ['Jacob', 'Harry', 'Mark', 'Anthony']
Remove duplicates from a list using the List Comprehension
Example
In this example, we will remove duplicates from a list using the List Comprehension −
# Creating a List with duplicate items mylist = ["Jacob", "Harry", "Mark", "Anthony", "Harry", "Anthony"] # Displaying the List print("List = ",mylist) # Remove duplicates from a list using List Comprehension resList = [] [resList.append(n) for n in mylist if n not in resList] print("Updated List = ",resList)
Output
List = ['Jacob', 'Harry', 'Mark', 'Anthony', 'Harry', 'Anthony'] Updated List = ['Jacob', 'Harry', 'Mark', 'Anthony']
Remove duplicates from a list using Set
Example
In this example, we will remove duplicates from a list using the set() method −
# Creating a List with duplicate items mylist = ["Jacob", "Harry", "Mark", "Anthony", "Harry", "Anthony"] # Displaying the List print("List = ",mylist) # Remove duplicates from a list using Set resList = set(mylist) print("Updated List = ",list(resList))
Output
List = ['Jacob', 'Harry', 'Mark', 'Anthony', 'Harry', 'Anthony'] Updated List = ['Anthony', 'Mark', 'Jacob', 'Harry']
Updated on: 16-Sep-2022
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