What are some examples of pass by value in Python?

What are some examples of pass by value in Python?

In Python, all arguments are passed by object reference, but it can seem like pass by value in some cases. For example, when you pass an immutable object like an integer or a string, the original object cannot be changed.

Can you give me a specific code example?

Sure! Here's a simple example:

def modify_value(x):
    x = 10

num = 5
modify_value(num)
print(num)  # Output will be 5

In this case, num remains 5 because integers are immutable.

What about lists? Are they passed by value?

Lists are mutable, so when you pass a list to a function, you can modify the original list. For example:

def modify_list(lst):
    lst.append(4)

my_list = [1, 2, 3]
modify_list(my_list)
print(my_list)  # Output will be [1, 2, 3, 4]

Here, my_list is modified because lists are passed by reference.

Thanks! That clarifies a lot.