Hi Again, I have run this code in my python environment and it returns my backend as expected:
import os os.environ['PYUSB_DEBUG'] = 'debug' import usb.core trig = usb.core.find() print trig Response when running code above: <usb.core.Device object at 0x0000000002E0CF98> I even went as far as packaging this with pyinstaller version 3.1.1 and when running the exe I get the same error: C:\Python27\Scripts\dist\testdebug>testdebug.exe Traceback (most recent call last): File "<string>", line 4, in <module> File "usb\core.py", line 846, in find ValueError: No backend available testdebug returned -1 When packaging the code as an exe I do get a warning file with some possibly relevant entries I will list below: missing module named usb.core.USBError - imported by usb.core, usb.backend.libusb10, usb.backend.libusb01, usb.backend.openusb missing module named 'usb.backend.libusb0' - imported by C:\Python27\lib\site-packages\PyInstaller\loader\rthooks\pyi_rth_usb.py missing module named 'usb.backend.libusb1' - imported by C:\Python27\lib\site-packages\PyInstaller\loader\rthooks\pyi_rth_usb.py I have tried using --hidden-backend=usb.backend.libusb10 when packaging and worked with the spec file a bit but none of the help threads online for this issue have helped me. Thanks for your assistance. -----Original Message----- From: Wander Lairson Costa [mailto:wander.lair...@gmail.com] Sent: Tuesday, May 10, 2016 09:48 To: pyusb-users Subject: Re: [pyusb-users] Issue finding backend when exe created with pyinstaller 3.1.1 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 <j...@nemo-q.com>: > 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 > > > > > > > > > > > > > ---------------------------------------------------------------------- > -------- Find and fix application performance issues faster with > Applications Manager Applications Manager provides deep performance > insights into multiple tiers of your business applications. It > resolves application problems quickly and reduces your MTTR. Get your > free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users > -- Best Regards, Wander Lairson Costa ---------------------------------------------------------------------------- -- Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. Mobile Device Manager Plus allows you to control only the apps on BYO-devices by containerizing them, leaving personal data untouched! https://ad.doubleclick.net/ddm/clk/304595813;131938128;j _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users ------------------------------------------------------------------------------ Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. Mobile Device Manager Plus allows you to control only the apps on BYO-devices by containerizing them, leaving personal data untouched! https://ad.doubleclick.net/ddm/clk/304595813;131938128;j _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
