pyRenamer is described as 'Batch renamer for GTK desktops.
With pyRenamer you can change the name of several files at the same time easily' and is a File Renamer in the file management category. There are more than 50 alternatives to pyRenamer for a variety of platforms, including Windows, Mac, Linux, BSD and Flathub apps. The best pyRenamer alternative is Bulk Rename Utility. It's not free, so if you're looking for a free alternative, you could try Bulk Rename Utility or Ant Renamer. Other great apps like pyRenamer are ReNamer, Keep It Shot, ScreenshotMagic and Rename Master.