is python pass by value
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title: understanding python's argument passing: pass by object reference
introduction:
in python, the concept of pass by value or pass by reference is often a topic of confusion for beginners. unlike some other programming languages, python follows a unique approach called "pass by object reference." this tutorial aims to explain this concept and provide code examples to illustrate how it works.
pass by object reference:
in python, when you pass a variable to a function, you are actually passing a reference to the object, not the object itself. this means that changes made to the object inside the function can affect the original object outside the function. however, this does not mean python is strictly pass by reference, as we'll see in the examples.
immutable objects:
let's start by looking at immutable objects like integers and strings. immutable objects cannot be modified after creation. when you pass an immutable object to a function, any modifications made to the object inside the function create a new object, leaving the original unchanged.
output:
in this example, the integer number remains unchanged outside the function despite the modification inside the function.
output:
in this example, the list my_numbers is modified inside the function, and these modifications persist outside the function.
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