What is Pass by Value In Python?

In this approach, we pass a copy of the actual variables in the function as a parameter. Hence any modification on parameters inside the function will not reflect in the actual variable.

The same is true for any operation performed by the function on the variable or the object 

To summarize, the copies of the variables and the objects in the context of the caller of the function are completely isolated.

Pass by Value In Python Example

Here, we will pass the integer x to the function which is an immutable data type. We then update the value of the integer inside the function and print the updated value. The changes are not seen outside the function as integers are immutable data types.

Output:

Before function call: 5
Inside function: 15
After function call: 5

Python programming uses “pass by reference object” concept while passing values to the functions. This article tries to show you the concept of pass by value and pass by reference in Python. We have shown different cases of passing values with examples. Passing values to a function in Python is different from other coding languages, but with this tutorial, you can easily understand the concept and implement it in your work.

Also Read:

Is Python call by reference or call by value

Developers jumping into Python programming from other languages like C++ and Java are often confused by the process of passing arguments in Python. The object-centric data model and its treatment of assignment are the causes of the confusion at the fundamental level.

In the article, we will be discussing the concept of how to pass a value by reference in Python and try to understand pass-by-reference examples in Python.