In Python, creating a new object e.g. with a list comprehension is often better than modifying an existing one:
item_list = ['item', 5, 'foo', 3.14, True]
item_list = [e for e in item_list if e not in ('item', 5)]
... which is equivalent to:
item_list = ['item', 5, 'foo', 3.14, True]
new_list = []
for e in item_list:
if e not in ('item', 5):
new_list.append(e)
item_list = new_list
In case of a big list of filtered out values (here, ('item', 5) is a small set of elements), using a set is faster as the in operation is O(1) time complexity on average. It's also a good idea to build the iterable you're removing first, so that you're not creating it on every iteration of the list comprehension:
unwanted = {'item', 5}
item_list = [e for e in item_list if e not in unwanted]
A bloom filter is also a good solution if memory is not cheap.
Answer from aluriak on Stack Overflow Top answer 1 of 10
288
In Python, creating a new object e.g. with a list comprehension is often better than modifying an existing one:
item_list = ['item', 5, 'foo', 3.14, True]
item_list = [e for e in item_list if e not in ('item', 5)]
... which is equivalent to:
item_list = ['item', 5, 'foo', 3.14, True]
new_list = []
for e in item_list:
if e not in ('item', 5):
new_list.append(e)
item_list = new_list
In case of a big list of filtered out values (here, ('item', 5) is a small set of elements), using a set is faster as the in operation is O(1) time complexity on average. It's also a good idea to build the iterable you're removing first, so that you're not creating it on every iteration of the list comprehension:
unwanted = {'item', 5}
item_list = [e for e in item_list if e not in unwanted]
A bloom filter is also a good solution if memory is not cheap.
2 of 10
54
You can do it in one line by converting your lists to sets and using set.difference:
item_list = ['item', 5, 'foo', 3.14, True]
list_to_remove = ['item', 5, 'foo']
final_list = list(set(item_list) - set(list_to_remove))
Would give you the following output:
final_list = [3.14, True]
Note: this will remove duplicates in your input list and the elements in the output can be in any order (because sets don't preserve order). It also requires all elements in both of your lists to be hashable.
GeeksforGeeks
geeksforgeeks.org › python › remove-multiple-elements-from-a-list-in-python
Remove Multiple Elements from List in Python - GeeksforGeeks
remove() method removes the first occurrence of a specified element from the list. To remove multiple elements, we can use a loop to repeatedly call remove().
Published: October 28, 2025
How can I remove all the same objects from a list?
Hi everyone! I’ve learned Python for weeks. And this is my question. How can I remove all the same objects from a list? How to remove all the ‘5’? list1=[1,2,5,4,3,5,5,6,7,8,5,5,5,9] for i in list1: if i==5: … More on discuss.python.org
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0
February 1, 2023Remove multiple elements from a list
Filter "Mango" out with a list comprehension: a = [fruit for fruit in a if fruit != "Mango"] A longer version would be: new_a = [] for fruit in a: if fruit != "Mango": new_a.append(fruit) a = new_a Edit: Thanks u/ClutchAlpha More on reddit.com
11
1
August 3, 2022[Question] Removing objects from a list while iterating over it
Try to iterate over a copy of the original list: for i in lst[:]: if i == 2: lst.remove(i) You can also do that without a for loop, with list comprehension: new_lst = [i for i in lst if i != 2] Note that solution may be faster, and is considered cleaner. More on reddit.com
26
4
November 8, 2010Cannot seem to remove negative numbers from list
if n in sorted_nums > 0 was parsed as if n in (sorted_nums > 0) all you need in that line is if n > 0: More on reddit.com
7
1
November 12, 2019How to delete Elements from a List in Python - YouTube
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Remove multiple elements from a Python List - YouTube
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Reddit
reddit.com › r/learnpython › remove multiple elements from a list
r/learnpython on Reddit: Remove multiple elements from a list
August 3, 2022 -
Hello, I have created a list. The list has duplicate items, and I want to removed both the items from list.
a = ["Grapes", "Pineapple", "Coconut", "Mango", "Apple", "Banana", "Orange", "Mango"]
I used remove method to remove the items from list. But remove method is removing only first item instead of both.
a.remove("Mango") Top answer 1 of 4
7
Filter "Mango" out with a list comprehension: a = [fruit for fruit in a if fruit != "Mango"] A longer version would be: new_a = [] for fruit in a: if fruit != "Mango": new_a.append(fruit) a = new_a Edit: Thanks u/ClutchAlpha
2 of 4
4
You could use list comprehension to do something like follows: a = [fruit for fruit in a if fruit != "Mango"] You could also use filter if you want: a = list(filter(lambda fruit: fruit != "Mango", a))
Real Python
realpython.com › remove-item-from-list-python
How to Remove Items From Lists in Python – Real Python
October 21, 2025 - You can delete multiple items from a list at once using the del statement with a slice, specifying the start and end indices of the range you want to remove. What method would you use to clear all items from a list in Python?Show/Hide
W3Schools
w3schools.com › python › python_lists_remove.asp
Python - Remove List Items
Python Overview Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods Python File Methods Python Keywords Python Exceptions Python Glossary · Built-in Modules Random Module Requests Module Statistics Module Math Module cMath Module · Remove List Duplicates Reverse a String Add Two Numbers
Python.org
discuss.python.org › python help
How can I remove all the same objects from a list? - Python Help - Discussions on Python.org
February 1, 2023 - Hi everyone! I’ve learned Python for weeks. And this is my question. How can I remove all the same objects from a list? How to remove all the ‘5’? list1=[1,2,5,4,3,5,5,6,7,8,5,5,5,9] for i in list1: if i==5: list1.remove(5) print(list1) the result is : [1, 2, 4, 3, 6, 7, 8, 5, 5, 9] but there are still two “5”
TutorialsPoint
tutorialspoint.com › article › how-do-you-remove-multiple-items-from-a-list-in-python
How do you remove multiple items from a list in Python?
March 26, 2026 - # Creating a List names = ["David","Jacob", "Harry", "Mark", "Anthony", "Steve", "Chris"] # Displaying the List print("List =", names) # Remove multiple items from a list using del keyword del names[2:5] # Display the updated list print("Updated ...
Quora
quora.com › How-do-I-remove-more-than-one-element-from-a-list-in-Python
How to remove more than one element from a list in Python - Quora
Answer (1 of 2): It really does depend on what you are trying to achieve; and to try to give you an insight I want to explore a very simple piece of code : [code]list1 = ['a','b','c','d'] list2 = list1 # Remove item 'b' & 'c' from list1 [/code]where line 3 is what we are trying to find. The ques...
Quora
quora.com › How-do-you-remove-elements-of-one-list-from-another-list-Python-list-list-comprehension-development
How to remove elements of one list from another list (Python, list, list comprehension, development) - Quora
Answer (1 of 2): The simplest way to remove the elements of Y from X is to create a new list of all of the elements except the ones in Y: [code]xs = [x for x in xs if x not in ys] [/code]However, if ys is big, this will be slow. Each element x has to be compared to all of the elements of ys to m...
scikit-learn
scikit-learn.org › stable › modules › tree.html
1.10. Decision Trees — scikit-learn 1.9.1 documentation
For instance, in the example below, decision trees learn from data to approximate a sine curve with a set of if-then-else decision rules. The deeper the tree, the more complex the decision rules and the fitter the model. ... Simple to understand and to interpret. Trees can be visualized. Requires little data preparation. Other techniques often require data normalization, dummy variables need to be created and blank values to be removed.
W3Schools
w3schools.com › python › python_lists_change.asp
Python - Change List Items
To change the value of a specific item, refer to the index number.
Vultr Docs
docs.vultr.com › python › standard library › list › remove()
Python List Remove() - Remove Element
November 11, 2024 - The remove() function in Python provides a reliable method to delete elements from a list based on their value. It is essential to handle exceptions properly when the target element might not be present in the list. For multiple occurrences, either repeat the method or use additional logic ...
Dataquest
dataquest.io › home › blog › how to easily remove duplicates from a python list
How to Easily Remove Duplicates from a Python List – Dataquest
May 12, 2025 - We use for-loop to iterate over an iterable: for example, a Python List. For a referesher on how for-loop works, kindly refer to this for-loop tutorial on DataQuest blog. To remove duplicates using for-loop, first you create a new empty list. Then, you iterate over the elements in the list containing duplicates and append only the first occurrence of each element in the new list. The code below shows how to use for-loop to remove duplicates from the students list.
DataCamp
datacamp.com › tutorial › python-remove-item-from-list
How to Remove an Item from a List in Python: A Full Guide | DataCamp
August 1, 2024 - The example below shows the slicing technique of removing multiple items from a list using the del keyword. # Initialize a list with integers from 1 to 5 my_list = [1, 2, 3, 4, 5] # Delete the elements from index 1 to index 2 (elements 2 and ...
W3Schools
w3schools.com › python › ref_list_pop.asp
Python List pop() Method
Remove List Duplicates Reverse ... Python Study Plan Python Interview Q&A Python Training ... The pop() method removes the element at the specified position....
Blender
blender.org › download › releases › 4-4
4.4 — Blender
Sort Elements node is 50% faster in common scenarios. The Warning node now has a dynamic label depending on the selected type. UI: Resizing nodes now support snapping. ... Added support for rendering videos using H.265/HEVC codec. BLENDER_SYSTEM_SCRIPTS now supports multiple paths.
Apache Kafka
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Documentation Redirect | Apache Kafka
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Fatos Morina
fatosmorina.com › home › how to quickly delete every other element in lists in python
How to Quickly Delete Every Other Element in Lists in Python - Fatos Morina
November 27, 2022 - Let us assume that we want to delete elements that are in positions 0, 2, 4, 6, meaning that we are starting from index 0 and we are adding 2 for every next element that we are deleting. To delete them, we can use the following notation: my_list = ["a", "b", "c", "d", "e", "f", "g"] # Delete every other element in the list del my_list[::2] # This is the same as del my_list[0::2] print(my_list) # ['b', 'd', 'f'] Similarly, if we want to remove elements that are in odd positions, we need to simply start from index 1 and then skip consistent elements:
StrataScratch
stratascratch.com › blog › adding-and-removing-list-elements-with-python
Adding and Removing List Elements with Python - StrataScratch
July 15, 2024 - ... Elements to be added: Methods like append(), insert(), and extend() can be used to add elements to a list. Deleting Elements: You can delete elements from a list using methods such as remove(), pop(), and the del statement.
Codefinity
codefinity.com › courses › v2 › 102a5c09-d0fd-4d74-b116-a7f25cb8d9fe › 39cc7383-2374-4f3f-b322-2cb0109e6427 › 224bba2e-ea3c-443a-b003-c0b277239426
Learn Using the remove() Method | Mastering Python Lists
12345 travel_wishlist = ["Paris", "Oslo", "Rome", "Sydney"] # Remove a specific city travel_wishlist.remove("Kyoto") print(travel_wishlist) # ValueError: list.remove(x): x not in list