[Bug] pybricksdev HID does not work in all environments.

[laurensvalk]

Describe the bug

 pybricksdev flash ev3/build/firmware.zip

only seems to work in some environments but not in others.

To reproduce

The actual flashing code seems irrelevant. Just testing on a local REPL will do.

In my pybricksdev development folder I can do:

(.venv) laurens@laurens-ubuntu:~/git-pybricks/pybricksdev$ python
Python 3.10.12 (main, Sep 11 2024, 15:47:36) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import hid
>>> dev = hid.device()
>>> dev.open(1684, 6)
>>> dev.close()

Anywhere else on the same system with the same privileges I get:

pybricks-micropython-py3.10laurens@laurens-ubuntu:~/git-pybricks/pybricks-micropython$ python
Python 3.10.12 (main, Sep 11 2024, 15:47:36) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import hid
>>> dev = hid.device()
>>> dev.open(1684, 6)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "hidraw.pyx", line 143, in hid.device.open
OSError: open failed
>>> 

And this is after bumping the pybricksdev dependency there.

I can't think of any differences between these environments. Since this is the same system, the udev rules seem fine.

Expected behavior
Work the same everywhere on the same system.

[dlech]

Just because pybricksdev was updated, it doesn't mean that other dependencies were updated. The .pyx file extension tells me that it has something to do with Cython, like it didn't get compiled correctly on install.

EDIT: Actually, I guess the error isn't about the .pyx file. 😐

[laurensvalk]

Thank you. The offending package seems to be hidapi at 0.14.0.post". My pybricksdev development folder was still on 0.14.0, which works. Forcing it to =0.14.0 seems to work around the issue.