Nanfeng

Notes on software development, code, and curious ideas

Batch-Renaming Images with a Python Prefix Script

In
Copy JPG and PNG files into another folder while adding a chosen prefix to every filename.

I recently needed to rename a large number of images. Doing it one file at a time was tedious, so I wrote a small batch-processing script.

What the script does

The script finds .jpg and .png files in a source directory, adds a user-supplied prefix to each filename, and copies the renamed files to a destination directory. The originals remain unchanged.

Environment

Python 3 or later.

Code

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import os
import shutil

src_folder = input("Enter the folder containing the images: ")
dest_folder = input("Enter the destination folder: ")
prefix = input("Enter the filename prefix: ")

if not os.path.exists(src_folder):
    print("The specified source folder does not exist")
else:
    if not os.path.exists(dest_folder):
        os.makedirs(dest_folder)

    files = os.listdir(src_folder)

    for file in files:
        if file.endswith('.jpg') or file.endswith('.png'):
            new_name = prefix + file
            old_path = os.path.join(src_folder, file)
            new_path = os.path.join(dest_folder, new_name)
            shutil.copy2(old_path, new_path)
            print(f'Copied and renamed: {file} to {new_name}')

On systems with case-sensitive suffix checks, extend the condition or use file.lower().endswith(('.jpg', '.png')) if files may use uppercase extensions.

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