[Released] PyUSB 1.0.0 beta 1

Dear all,

I am proud to announce that PyUSB 1.0.0 beta is out.

What's new in PyUSB 1.0.0 (beta 1)?

  • Isochronous transfer for libusb 1.0 (by David Halter).
  • Experimental OpenUSB support.
  • Documentation update.
  • PYUSB_DEBUG_LEVEL environment variable is now called PYUSB_DEBUG.
  • Legacy module nwo groups according to their bus.
  • Version information available for apps (by Chris Clark).
  • Faster read operation (by themperek).
  • Tox support (by ponty).
  • Support for port number info (by Stefano Di Martino).
  • Several bug fixes (please, check the Changelog file).

Known issues

  • OpenUSB backend hangs on some control transfers.


  • More tests with legacy module.
  • Isochronous transfers for libusb-win32.

Download page


This release took much more time than I was expecting to, so I would like
to thank you all for your patience, and specially for those whose contributed
for this release.

Wander Lairson Costa

Posted by Wander Lairson 2013-10-16