Add a blank white border to an image in python using PIL

Add_border.py

from PIL import Image

def add_border(input_image_path, output_image_path, border_size=100):
    # Open an existing image
    img = Image.open(input_image_path)
    
    # Get the size of the original image
    width, height = img.size
    
    # Make the new image size as the original size plus the border
    new_width = width + 2 * border_size
    new_height = height + 2 * border_size
    
    # Create a new image with RGB mode, white color, and the new size
    new_img = Image.new("RGB", (new_width, new_height), "white")
    
    # Paste the original image into the new image at the border offset
    new_img.paste(img, (border_size, border_size))
    
    # Save the new image
    new_img.save(output_image_path)
    print(f"The output image is saved to: {output_image_path}")

# Using the function
input_image_path = "testimg.jpg"
output_image_path = "modified.jpg"
add_border(input_image_path, output_image_path)