Suppose I have function with list parameter, and inside its body I want to modify passed list, by copying elements of an array to the list: def function1 (list_arg): a = function2() #function2 returns an array of numbers list_arg = list(a) list1 = [0] * 5 function1(list1) list1 [0,0,0,0,0]

Python doesn't copy objects you pass during a function call ever. Function parameters are names. When you call a function, Python binds these parameters to whatever objects you pass (via names in a caller scope). Objects can be mutable (like lists) or immutable (like integers and strings in Python). A mutable object you can change. You can't ...

Passing a List as an Argument. You can send any data types of argument to a function (string, number, list, dictionary etc.), and it will be treated as the same data type inside the function. E.g. if you send a List as an argument, it will still be a List when it reaches the function:

Jul 12, 2019 · Because python parameter is passed by object reference, and list is a mutable object, once you pass a list into function and change its element, the original one would be change too.

Dec 26, 2024 · We can directly pass a list as a function argument. When a list is passed to a function, the function can modify the original list since lists are mutable. Python also allows passing a nested list (a list within a list) as a function argument.

Mar 14, 2019 · In this beginner Python tutorial, we'll take a look at mutable and immutable data types, and learn how to keep dictionaries and lists from being modified by our functions.

Feb 20, 2024 · An intuitive way to pass a list as arguments to a function is by using the asterisk (*) operator. This operator unpacks the list and passes its elements as separate positional arguments to the function (*args). Here’s an example: def multiply(x, y, z): return x * y * z numbers = [2, 3, 4] result = multiply(*numbers) print(result) Output: 24

List arguments¶ When you pass a list to a function, the function gets a reference to the list. If the function modifies a list parameter, the caller sees the change. For example, delete_head removes the first element from a list and is used like this:

List parameters. Python allows the definition of a function that can take an arbitrary number of optional arguments. This is convenient when one does not know how many argument will be specified in a function call, but needs the function to handle a variable number of arguments.

Nov 23, 2024 · How to Use a List as Function Parameters in Python. The Challenge: Passing a List to a Function; Solution 1: The Splat Operator; Solution 2: Complete Example; Solution 3: Using **kwargs for More Flexibility; Alternative Ways to Address the Issue; Practical Examples; FAQs on Using a List as Function Parameters in Python