Ok I understand now. Here is the log -
2011-12-20 11:14:03,615 ERROR:usb.backend.libusb10:Error loading
libusb 1.0 backend
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\usb\backend\libusb10.py", line
648, in get_backend
_lib = _load_library()
File "C:\Python27\lib\site-packages\usb\backend\libusb10.py", line
198, in _load_library
l = WinDLL(libname)
File "C:\Python27\lib\ctypes\__init__.py", line 353, in __init__
self._handle = _dlopen(self._name, mode)
TypeError: expected string or Unicode object, NoneType found
2011-12-20 11:14:03,670 ERROR:usb.backend.openusb:Error loading OpenUSB backend
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\usb\backend\openusb.py", line
701, in get_backend
_lib = _load_library()
File "C:\Python27\lib\site-packages\usb\backend\openusb.py", line
248, in _load_library
raise OSError('USB library could not be found')
OSError: USB library could not be found
2011-12-20 11:14:03,686 ERROR:usb.backend.libusb01:Error loading
libusb 0.1 backend
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\usb\backend\libusb01.py", line
576, in get_backend
_lib = _load_library()
File "C:\Python27\lib\site-packages\usb\backend\libusb01.py", line
201, in _load_library
return CDLL(libname)
File "C:\Python27\lib\ctypes\__init__.py", line 353, in __init__
self._handle = _dlopen(self._name, mode)
TypeError: expected string or Unicode object, NoneType found
Dan
On Tue, Dec 20, 2011 at 9:38 AM, Wander Lairson Costa
<wander.lair...@gmail.com> wrote:
>
>
> 2011/12/20 JA <metala...@gmail.com>
>>
>> How do you set the environment variable? I am new to python, assumed
>> it would be something like this -
>>
>> import logging
>>
>> PYUSB_DEBUG_LEVEL = "debug"
>> PYUSB_LOG_FILENAME = "C:\dump"
>>
>> But it isn't working.
>>
>
> They are not python variables, they are environment variables.
>
> --
> Best Regards,
> Wander Lairson Costa
>
>
>
> ------------------------------------------------------------------------------
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------------------------------------------------------------------------------
Write once. Port to many.
Get the SDK and tools to simplify cross-platform app development. Create
new or port existing apps to sell to consumers worldwide. Explore the
Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join
http://p.sf.net/sfu/intel-appdev
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