Python Function to Swap List Elements: f3(lst, i)

This code defines a Python function called f3(lst, i) that swaps two consecutive elements in a list.

def f3(lst, i):
    lst[i] = lst[i + 1]
    return lst

The function takes a list lst and an index i as input. It then assigns the value of the element at index i + 1 to the element at index i, effectively swapping their positions. Finally, the modified list is returned.

Explanation:

• lst[i] = lst[i + 1] This line is the core of the function. It takes the value of the element at index i + 1 and assigns it to the element at index i, effectively swapping their positions.
• return lst This line returns the modified list after the swap has been performed.

Example Usage:

my_list = [1, 2, 3, 4, 5]
index = 2
result = f3(my_list, index)
print(result)  # Output: [1, 2, 3, 3, 5]

In this example, the element at index 2 (which is 3) is swapped with the element at index 3 (also 3). The resulting list is [1, 2, 3, 3, 5].