[pyusb-users] not finding Arduino or mouse devices

[Michael H. <mic...@ri...>]

I have three USB devices connected,
an Atmel ICE, a mouse and a CDC device.
usb.core.find(find_all=True)
finds the Atmel ICE twice, but not the others.

I'm stuck on Windows 10.
The device manager lists the CDC device under
Ports (COM & LPT)
Arduino Mega 2560 (COM6)
The Arduino serial monitor has no trouble finding it.
The device manager lists the mouse under
Human Interface Devices
Microsoft USB Wheel Mouse Optical

ATmega2560's do not do USB natively.
A chip that does is between the ATmega2560 and the USB cable.

Is there some trick to get pyusb to notice
the mouse and the CDC device?