Re: [pyusb-users] Issue finding backend when exe created with pyinstaller 3.1.1

[Wander L. C. <wan...@gm...>]

One way to investigate what's going on is to set the PYUSB_DEBUG=debug
environment variable.

2016-05-09 11:53 GMT-03:00 Jay Newens <ja...@ne...>:
> I have been having issues getting my program to run as an exe using packager
> pyinstaller version 3.1.1. There is a version 3.2 but it has other issues so
> I cannot use it. My program checks the status of the Zebra KR403 printer and
> my program works fine in my Python 2.7.9 environment, PYUsb 1.0.0, on
> Windows 7,  but when I create the exe it does not work. Pyinstaller 2.1
> works ok but my other parts of my program have been updated and I cannot use
> it any longer, the list of problems there is too long.
>
>
>
> This is how I set up the backend in my code in my python environment:
>
>
>
> import usb
>
> import usb.core
>
> import usb.util
>
> import usb.backend.libusb10 as libusb10
>
> import sys
>
> import requests
>
> dev = usb.core.find(idVendor= int(VID), idProduct= int(PID),
> backend=libusb10.get_backend())
>
>
>
> After creating my exe, when I run it from the command prompt I get the
> following:
>
>
>
> Traceback (most recent call last):
>
>   File "<string>", line 184, in <module>
>
>   File "usb\core.py", line 846, in find
>
> ValueError: No backend available
>
> ZebraKR403PaperStatus2.2 returned -1
>
>
>
> I understand that this could be an issue with pyinstaller and I will report
> the same issue there. Does anyone else have this issue or have a solution?
>
>
>
> Thanks in advance:
>
>
>
> Jay
>
>
>
>
>
>
>
>
>
>
>
>
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-- 
Best Regards,
Wander Lairson Costa