GeeksforGeeks
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Default arguments in Python - GeeksforGeeks
In the first call greet(), no argument is passed, so Python uses the default value "Guest". In the second call greet("Kate"), the default value is overridden with "Kate". def function_name(param1=value1, param2=value2, ...): # function body
Published: March 18, 2026
Home and Learn
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Python Default function values
You can set up your Python functions ... equals sign.After the equals sign, type a value for your variable. For example, suppose we want our function from the previous lesson to add ten to the answer....
Today I re-learned: Python function default arguments are retained between executions
I had to find this out the hard way :/ P.s. I am a little rusty on python, but if you want a mutable default value (say a list) you can make the default None then inside the function you would reassign the variable if it's None. More on reddit.com
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January 20, 2023What is the best practice for __init__ with many arguments?
I'm a beginner but wouldn't it be better to have those dozen lines laid out nice and readable rather than trying to compress everything into less lines and end up making it less maintainable? It seems like one of the points of using classes is to have nice and neat structured code. So, I would think making the class structure itself very clear would be the way to go. More on reddit.com
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October 16, 2013Making defaultdict create defaults that are a function of the key.
You should put this on the Python Cookbook.
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June 5, 2014Why does python's async execution model so strictly separate synchronous from asynchronous functions?
I just ported a large project (50K LOC) completely to async. I changed thousands of lines of code.
First, I love the async model and everything about it.
However, I really shouldn't have had to do all that work. It isn't just adding a bunch of async and await everywhere. It is converting every for loop into an async for loop. It is converting every context manager and list comprehension into an async one. It is converting yield from back into regular loops. It is rearchitecting things if you have a generator expression. Essentially there are two syntaxes now, one for async functions and one for non-async, and they haven't transitioned all the syntax from non-async to async yet.
Essentially, when you mark a function as async, you're telling the interpreter that someone, maybe 7 layers deep, might wait on a OS object. You could have 99% of your code be non-async, but because of that one dude (probably waiting on a socket), thousands of lines of code have to change. This viral nature of async is bad. I don't mind marking the functions, I do mind converting code from one syntax to another simply because it makes the interpreter slightly easier to implement.
If an async function calls another async function, the await should be implicit. There should be some other keyword to *NOT* await on a called coroutine. In this way, you wouldn't have to rewrite every function.
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November 4, 201806:07
Python default arguments are awesome! 👍 - YouTube
07:17
Python | Function | Default Values - YouTube
10:43
Python Default Value Parameter | Positional Arguments Example | ...
Defining Python Functions With Default and Optional Arguments - ...
07:53
Python Tutorial for Beginners 22 - Default Arguments, *args and ...
W3Schools
w3schools.com › python › gloss_python_function_default_parameter.asp
Python Default Parameter Value
Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Training ... The following example shows how to use a default parameter value. If we call the function without argument, it uses the default value:
TutorialsPoint
tutorialspoint.com › What-are-default-arguments-in-python
Python - Default Arguments
June 12, 2020 - # function definition def percent(phy, ... with default argument result = percent(phy, maths) print ("percentage:", result) phy = 40 maths = 46 result = percent(phy, maths, 100) print ("percentage:", result) On executing, this code ...
Boot.dev
boot.dev › lessons › 3963019a-a8ce-45c0-b988-3e6e4121aa36
Learn Python for Beginners: Default Values | Boot.dev
They're created by using the assignment (=) operator inside the function signature: def get_greeting(email, name="there"): print(f"Hello {name}, welcome! You've registered your email: {email}") If we call it with both parameters, it uses the ...
InterServer
interserver.net › home › python › how to use default arguments in python for clean and flexible code
How to Use Default Arguments in Python for Clean and Flexible Code - Interserver Tips
April 23, 2026 - Default arguments are values given to function parameters. If you do not provide a value when calling the function, Python uses the default value. This helps make functions flexible and easier to use. In Python, you can set a default value by using an equal sign = after the parameter name. For example:
Python Tutorial
pythontutorial.net › home › python basics › python default parameters
Python Default Parameters
October 5, 2020 - When you call a function and pass an argument to the parameter that has a default value, the function will use that argument instead of the default value.
Stack Abuse
stackabuse.com › default-arguments-in-python-functions
Default Arguments in Python Functions
March 16, 2020 - In this case, you will see that 4 will be returned by find_square() function since in the absence of the value for the find_square() function, the default value of 2 will be used as the value for the find_square() function, as shown below: ... A Python function can have multiple default arguments as well.
Proglab
sp.proglab.nl › python › en › default-arguments
Default-arguments - Scientific Programming
In the first example, the list ['a', 'B', 'c'] is passed to the function, and the default values for separator ('_') and lowercase (True) are used.
Tecladocode
python.tecladocode.com › treasure hunters › default parameter values
Default Parameter Values | Introduction to Python
When defining the function, we can provide a default value for any parameter by writing = followed by the default value. ... In the example above, the parameter y has been given a default value of 3. When calling the add function, we can now ...
Medium
medium.com › @nebiyuelias1 › be-careful-when-using-default-arguments-in-python-fd92df94efee
Be careful when using default arguments in Python | by Nebiyu Elias | Medium
December 16, 2021 - The doc is saying if you use a mutable object as a default argument it will be evaluated only once. So in the previous example: When the function is defined for the first time(I am not saying when it’s called, I’m saying when it’s defined), Python evaluates the default argument and accumulates(caches) it somehow.
Python Guides
pythonguides.com › use-default-function-arguments-in-python
How to Use Default Function Arguments in Python?
March 19, 2025 - In Python, you can assign default values to function parameters. If an argument is not provided when the function is called, the parameter will automatically take on the specified default value. Here’s a simple example:
APXML
apxml.com › courses › python-for-beginners › chapter-5-building-blocks-functions › python-default-arguments
Python Default Argument Values | Optional Parameters
Args: name: The name of the person to greet. greeting: The greeting message to use (defaults to "Hello"). """ print(f"{greeting}, {name}!") # Calling the function greet("Alice") # Uses the default greeting greet("Bob", "Good morning") # Overrides the default greeting ...
Programiz
programiz.com › python-programming › function-argument
Python Function Arguments (With Examples)
In the above example, the function add_numbers() takes two parameters: a and b. Notice the line, ... Here, add_numbers(2, 3) specifies that parameters a and b will get values 2 and 3 respectively. In Python, we can provide default values to function arguments.
Codecademy
codecademy.com › learn › learn-intermediate-python-3 › modules › int-python-function-arguments › cheatsheet
Learn Intermediate Python 3: Function Arguments Cheatsheet | Codecademy
The use of keyword arguments when calling a function allows the arguments to be passed in any order — not just the order that they were defined in the function. If the function is invoked without a value for a specific argument, the default value will be used. ... In Python, a default parameter is defined with a fallback value as a default argument.
Note.nkmk.me
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Default Parameter Values in Python Functions | note.nkmk.me
May 12, 2025 - To avoid this behavior, you can use None as the default value and create a new object inside the function.
Medium
medium.com › python4you › python-functions-defaults-explained-ee962c7c6f7a
Python Functions Defaults Explained | by Artem Rys | python4you | Medium
April 21, 2019 - The empty list that we see from the f.__defaults__ result is basically the l variable in the function code.
Medium
medium.com › @wvrushali27 › function-with-default-arguements-in-python-78afd929b599
Function with default arguements in python | by Vrushali Walekar | Medium
January 2, 2024 - Default value always comes at the last to parameter list. we can have multiple parameters values in function. ... let’s understand through the function test4 .the function test4 contains 3 arguements out of which 2 arguments are assigned with default values.
Reddit
reddit.com › r/python › today i re-learned: python function default arguments are retained between executions
r/Python on Reddit: Today I re-learned: Python function default arguments are retained between executions
January 20, 2023 - P.s. I am a little rusty on python, but if you want a · mutable default value (say a list) you can make the · default None then inside the function you would reassign the variable if it's None.
Educative
educative.io › answers › what-are-default-arguments-in-python-and-how-can-they-be-useful
What are default arguments in Python, and how can they be useful?
Below is a function that performs basic arithmetic operations on two numbers. ... The default operation/action is addition, but we can specify subtraction or other actions by providing the action argument.