flags.FLAGS( crashes bpython

Bpython tries to do some fancy stuff like lookup obj.__name__ and check for AttributeError. The code in common/cfg.py has a special getattr that raises a non AttributeError exception so it leads to a crash and stack trace in bpython:

Traceback (most recent call last):
  File "/usr/local/share/python/bpython", line 9, in <module>
    load_entry_point('bpython==0.10.1', 'console_scripts', 'bpython')()
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 1756, in main
    banner=banner)
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 1658, in curses_wrapper
    return func(stdscr, *args, **kwargs)
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 1727, in main_curses
    clirepl.repl()
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 1015, in repl
    inp = self.get_line()
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 600, in get_line
    if self.p_key(key) is None:
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 911, in p_key
    self.addstr(key)
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 290, in addstr
    self.complete()
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/cli.py", line 383, in complete
    self.list_win_visible = repl.Repl.complete(self, tab)
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/repl.py", line 540, in complete
    if not self.get_args():
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/repl.py", line 511, in get_args
    self.argspec = inspection.getargspec(func, f)
  File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/bpython/inspection.py", line 229, in getargspec
    func_name = getattr(f, '__name__', None)
  File "nova/flags.py", line 114, in __getattr__
    return getattr(self._conf, name)
  File "nova/common/cfg.py", line 777, in __getattr__
    return self._substitute(self._get(name))
  File "nova/common/cfg.py", line 930, in _get
    info = self._get_opt_info(name, group)
  File "nova/common/cfg.py", line 1010, in _get_opt_info
    raise NoSuchOptError(opt_name, group)
nova.common.cfg.NoSuchOptError: no such option: __name__

To test, you do:
bpython
then at prompt:
>>> from nova import flags
>>> flags.FLAGS(