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usb.core.USBError: [Errno 13] Access denied (insufficient permissions)

See original GitHub issue

Hi braiden,

I recently updated to 12.04 x64 and am attempting to reinstall this package. Everything goes fine when I install ez_setup and then python-ant-downloader via pip.

Now, regardless of whether I install the package with or without the “–user” option in pip, I receive the following error when I run ant-downloader:

josh@josh-ThinkPad:~/.local/bin$ ant-downloader 
Traceback (most recent call last):
  File "/home/josh/.local/bin/ant-downloader", line 8, in <module>
    load_entry_point('python-ant-downloader==12.03.21', 'console_scripts', 'ant-downloader')()
  File "/home/josh/.local/lib/python2.7/site-packages/antd/main.py", line 73, in downloader
    host = antd.cfg.create_antfs_host()
  File "/home/josh/.local/lib/python2.7/site-packages/antd/cfg.py", line 112, in create_antfs_host
    host = antfs.Host(create_ant_session(), keys)
  File "/home/josh/.local/lib/python2.7/site-packages/antd/cfg.py", line 99, in create_ant_session
    session = ant.Session(create_ant_core())
  File "/home/josh/.local/lib/python2.7/site-packages/antd/cfg.py", line 95, in create_ant_core
    return ant.Core(create_hardware())
  File "/home/josh/.local/lib/python2.7/site-packages/antd/cfg.py", line 91, in create_hardware
    return hw.UsbHardware(id_vendor, id_product, bulk_endpoint)
  File "/home/josh/.local/lib/python2.7/site-packages/antd/hw.py", line 48, in __init__
    dev.set_configuration()
  File "build/bdist.linux-x86_64/egg/usb/core.py", line 547, in set_configuration
  File "build/bdist.linux-x86_64/egg/usb/core.py", line 91, in managed_set_configuration
  File "build/bdist.linux-x86_64/egg/usb/core.py", line 70, in managed_open
  File "build/bdist.linux-x86_64/egg/usb/backend/libusb10.py", line 494, in open_device
  File "build/bdist.linux-x86_64/egg/usb/backend/libusb10.py", line 403, in _check
usb.core.USBError: [Errno 13] Access denied (insufficient permissions)

I can run the program as root, but obviously this is something I would rather not do. The problem seems to be more localized to libusb1.0, but if you had any ideas, I would really appreciate it. Thanks!