There is the dali-interface Python library which seems to support a few PC DALI interfaces based on USB-HID and serial. I don’t know how well the translation between USB-HID/serial and DALI is standardized, so I can’t tell you how compatible this library is with DALI interfaces that are not explicitly listed in the README.

Software using this library includes dali_mon for monitoring the DALI bus and dali_cli for sending commands.

You are missing the Neuzeil at the end of the Schnur.

Sure, but the newest version of each package is four years old and riddled with dozens of Debian-specific patches that somehow only make it run worse.

Another Technical Mistake