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Delete an element from a dictionary

stackoverflow.com › questions › 5844672 › delete-an-element-from-a-dictionary

The del statement removes an element:

del d[key]

Note that this mutates the existing dictionary, so the contents of the dictionary changes for anybody else who has a reference to the same instance. To return a new dictionary, make a copy of the dictionary:

def removekey(d, key):
    r = dict(d)
    del r[key]
    return r

The dict() constructor makes a shallow copy. To make a deep copy, see the copy module.

Note that making a copy for every dict del/assignment/etc. means you're going from constant time to linear time, and also using linear space. For small dicts, this is not a problem. But if you're planning to make lots of copies of large dicts, you probably want a different data structure, like a HAMT (as described in this answer).

Answer from Greg Hewgill on Stack Overflow

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Python - Remove Dictionary Items

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stackoverflow.com › questions › 5844672 › delete-an-element-from-a-dictionary

python - Delete an element from a dictionary - Stack Overflow

The del statement removes an element:

del d[key]

Note that this mutates the existing dictionary, so the contents of the dictionary changes for anybody else who has a reference to the same instance. To return a new dictionary, make a copy of the dictionary:

def removekey(d, key):
    r = dict(d)
    del r[key]
    return r

The dict() constructor makes a shallow copy. To make a deep copy, see the copy module.

Note that making a copy for every dict del/assignment/etc. means you're going from constant time to linear time, and also using linear space. For small dicts, this is not a problem. But if you're planning to make lots of copies of large dicts, you probably want a different data structure, like a HAMT (as described in this answer).

pop mutates the dictionary.

 >>> lol = {"hello": "gdbye"}
 >>> lol.pop("hello")
     'gdbye'
 >>> lol
     {}

If you want to keep the original you could just copy it.

Discussions

Delete item from dict Python

d = {k:v for k,v in defalutdict.items() if 'UP' not in k} More on reddit.com

r/learnpython

27

1

July 28, 2021

Python - How to delete an item/value from a key in a dictionary?

If you want to remove the value but keep the key, set the value for the key to something like 'None' More on reddit.com

r/learnprogramming

9

2

November 13, 2022

Can we have a .discard() for dictionary please - Ideas - Discussions on Python.org

Ref: https://discuss.python.org/t/can-we-have-a-delete-for-dictionary-please/ In the ref I was given a solution for my problem, which while usable, is not thematically correct. .pop() is for removing and retrieving an existing item (so a .get() and ‘del item’ combined). More on discuss.python.org

discuss.python.org

1

March 2, 2024

Can we have a .delete() for dictionary please

I would like to see a .delete() that doesn’t raise KeyError if the key doesn’t exist. I’m suggesting .delete() so that existing code is not affected. I’m dealing with json input from Grinding Gear Games and i’m getting… More on discuss.python.org

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March 2, 2024

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November 30, 2024

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Python remove item from dictionary by key - gnlqbc.today

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Python dictionary remove item - rwkbao.beer

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askpython.com › home › ways to delete a dictionary in python

Ways to Delete a Dictionary in Python - AskPython

February 16, 2023 - Python popitem() function can be used to delete a random or an arbitrary key-value pair from a Python dict. The popitem() function accepts no arguments and returns the deleted key-value pair from the dictionary.

reddit.com › r/learnpython › delete item from dict python

r/learnpython on Reddit: Delete item from dict Python

July 28, 2021 -

Hello,

I have this dictionary:

defaultdict={'UP 1': 1, 'P sMaple-sMary': 36, 'UP sMaple': 14, 'UP sMary': 32, 'P sJewell-sCynthia': 3, 'UP sJewell': 0, 'UP sCynthia': 4, 'P sPamela-sRachel': 1, 'UP sPamela': 0, 'UP sRachel': 0, 'P sSylvia-sElsie': 1, 'UP sSylvia': 0, 'UP sElsie': 5, 'P sMarcelene-sMaria': 7, 'UP sMarcelene': 5}

And I want to remove item if it starts UP. I tried the following code but it does not work

key_to_remove="UP"
del defaultdict[key_to_remove] #I tried to remove
res2 = Counter(defaultdict.values()) 3after removing, I wanted to count each value
print(res2)

d = {k:v for k,v in defalutdict.items() if 'UP' not in k}

for key in your_dict: if key.startswith(key_to_remove): del your_dict[key]

Find elsewhere

Google Bing Mojeek

freecodecamp.org › news › python-remove-key-from-dictionary

Python Remove Key from Dictionary – How to Delete Keys from a Dict

February 22, 2023 - Let's get started! The most popular method for removing a key:value pair from a dictionary is to use the del keyword. You can also use it to eliminate a whole dictionary or specific words.

medium.com › @adarshp24comp › accessing-updating-and-deleting-dictionary-items-in-python-f3aa08a157dd

Accessing, Updating, and Deleting Dictionary Items in Python | by Adarsh Anil Patil | Medium

October 30, 2025 - There are multiple ways to remove items from a dictionary: ... {'name': 'Adarsh', 'age': 21, 'course': 'Computer Science', 'marks': 95, 'email': 'adarsh@gmail.com'} If you try to delete a key that doesn’t exist, Python will raise a KeyError.

geeksforgeeks.org › python › python-ways-to-remove-a-key-from-dictionary

Python - Ways to remove a key from dictionary - GeeksforGeeks

October 29, 2025 - Python · a = {"name": "Nikki", ... after using the pop() method, key - "age" is completely removed from the dictionary. del() statement deletes a key-value pair from the dictionary directly and does not return the value making ...

reddit.com › r/learnprogramming › python - how to delete an item/value from a key in a dictionary?

r/learnprogramming on Reddit: Python - How to delete an item/value from a key in a dictionary?

November 13, 2022 -

I know that I can delete a key using del but I don't know if I can remove an item and leave the key as it is.

If you want to remove the value but keep the key, set the value for the key to something like 'None'

Just delete everything related to the key and re-add it later. You don't want a null value because it could throw a null-pointer exception. Just use an if statement when you need to re-add something using that key to check if that key is present. If not then re-add the key and the corresponding value.

docs.vultr.com › python › examples › delete-an-element-from-a-dictionary

Python Program to Delete an Element From a Dictionary | Vultr Docs

December 5, 2024 - In this article, you will learn how to delete elements from a dictionary in Python using various methods. These techniques include using the del keyword, the pop() method, and the popitem() method.

note.nkmk.me › home › python

Remove an Item from a Dictionary in Python: pop, popitem, clear, del | note.nkmk.me

April 27, 2025 - Built-in Types - dict.clear() — Python 3.13.3 documentation · d = {'k1': 1, 'k2': 2, 'k3': 3} d.clear() print(d) # {} ... The del statement can also be used to delete an item from a dictionary.

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discuss.python.org › ideas

Can we have a .discard() for dictionary please - Ideas - Discussions on Python.org

March 2, 2024 - Ref: https://discuss.python.org/t/can-we-have-a-delete-for-dictionary-please/ In the ref I was given a solution for my problem, which while usable, is not thematically correct. .pop() is for removing and retrieving an existing item (so a .get() and ‘del item’ combined).

Python Engineer

python-engineer.com › posts › delete-key-dictionary

How to delete a key from a dictionary in Python - Python Engineer

This article shows how you can remove a key from a dictionary in Python. To delete a key, you can use two options: Using del my_dict['key'] Using my_dict.pop('key', None) Let's look at both options in detail: #more ·

discuss.python.org › python help

Can we have a .delete() for dictionary please - Python Help - Discussions on Python.org

March 2, 2024 - I would like to see a .delete() that doesn’t raise KeyError if the key doesn’t exist. I’m suggesting .delete() so that existing code is not affected. I’m dealing with json input from Grinding Gear Games and i’m getting really sick of this: if gem.get("baseTypeName"): del gem["baseTypeName"] if gem["grantedEffect"].get("baseTypeName"): del gem["grantedEffect"]["baseTypeName"] if gem["secondaryGrantedEffect"].get("baseTypeName"): del gem["secondaryGrantedEffe...

sentry.io › sentry answers › python › delete element from a dictionary in python

Delete element from a dictionary in Python | Sentry

August 15, 2023 - To delete an element from a dictionary, we can use the del keyword. For example: products = {"apples": 1, "oranges": 3, "pears": 2} print(products) # will print the dictionary defined above del products["oranges"] print(products) # will print ...

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geeksforgeeks.org › python › python-removing-dictionary-from-list-of-dictionaries

Removing Dictionary from List of Dictionaries - Python - GeeksforGeeks

July 11, 2025 - Using list comprehension, we can filter the list while excluding dictionaries that meet the condition.

pythonmorsels.com › removing-a-dictionary-key

Removing a dictionary key - Python Morsels

January 13, 2023 - To delete a key from a dictionary, you can use Python's del statement or you can use the dictionary pop method.