💻 How to Use This Script on Your Operating System

✅ Linux (Debian, Ubuntu, Fedora, Arch, etc.)

No additional installation is required. Python 3 is pre-installed on most distributions.

python3 renombrar.py

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🪟 Windows

1. Install Python (if not already installed):

   • Go to https://www.python.org/downloads/
   • Download the latest version of Python 3.x for Windows.
   • During installation, make sure to check "Add Python to PATH" before clicking "Install Now".

2. Verify the installation: Open the Command Prompt (search for "cmd" or "PowerShell") and run:

   python --version

   If it shows something like Python 3.x.x, you're good to go.

3. Run the script:

   • Navigate to the folder containing your files and the script. For example:

     cd "C:\Users\YourUsername\Pictures\Libro"

   • Then run:

     python renombrar.py

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🍎 macOS

1. Check if Python 3 is installed: Open Terminal (via Spotlight or Launchpad) and run:

   python3 --version

   If it shows a Python 3 version, you can run the script with:

   python3 renombrar.py

2. If Python 3 is not installed:

   • Install Homebrew if you don’t have it:

     /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

   • Then install Python:

     brew install python

   • Finally, run the script:

     python3 renombrar.py

rename-numbered-files-from-1-to-001

This Python script (renombrar.py) renames sequentially numbered files by adding leading zeros to ensure proper alphabetical order.

🧠 What is it for?

When you have files like:

libro 1.jpg
libro 2.jpg
...
libro 10.jpg
libro 100.jpg

Most systems sort them alphabetically like this:

libro 1.jpg
libro 10.jpg
libro 100.jpg
libro 2.jpg
...

This breaks the expected numerical order. The script renames them like:

libro 001.jpg
libro 002.jpg
...
libro 100.jpg

That way, the order is preserved in both terminals and any software that relies on filenames.

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⚙️ How to use

1. Place the renombrar.py script in the folder containing your image files.
2. Make sure Python 3 is installed on your system.
3. Open a terminal in that folder and run:

python3 renombrar.py

The script looks for all .jpg files with the word "libro" in the filename, extracts their number, and renames them using three-digit formatting (e.g. libro 001.jpg, libro 002.jpg, etc.).

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📌 Requirements

• Python 3.x
• .jpg image files with numbers in their names (e.g. libro 1.jpg, libro 23.jpg, etc.)

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🧩 Customization

To use other image formats (like .jpeg or .png) or different filename prefixes, you can modify this line:

archivos = [f for f in os.listdir('.') if f.lower().endswith('.jpg') and 'libro' in f.lower()]

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📄 License

This project is Free Software to use. You can modify, share, and adapt it as needed.