Change the extension of multiple files

Import OS

Directory = "/Route/Directory/You" # change this

For Fileneame in os.listdir (Directory):
FULL_PATH = os.path.join (Directory, Fileename)

# Only if the file is and the extension is not
if os.path.isfile(full_path) and '.' not in filename:
    new_name = filename + '.pdf'
    new_path = os.path.join(directory, new_name)
    os.rename(full_path, new_path)
    print(f"تغییر نام: {filename} → {new_name}")

Print ("All extensions without extension to pdf change"))

Hi dear friend, steps are that:

1. Enter the directory you want.
2. Click View at the top menu.
3. Click on the Show section.
4. Tick the file name extensions.
5. The extension of all files must be revealed now.
6. You can change both their name and extension now.

You can use the following code in the terminal to change the extension of the files to the PDF in a directory:

for f in *; do mv "$f" "$f.pdf"; done

This code changes all files without extension to the .PDF extension.