#!pycon

>>> func = lambda (x, y), z: (x, y, z)
>>> func((1, 2), 3

#!pytb

Traceback (most recent call last):
  File "/usr/bin/bpython", line 9, in <module>
    load_entry_point('bpython==0.9.6.2', 'console_scripts', 'bpython')()
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 1594, in main
    banner=banner)
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 1496, in curses_wrapper
    return func(stdscr, *args, **kwargs)
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 1562, in main_curses
    repl.repl()
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 937, in repl
    inp = self.get_line()
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 546, in get_line
    if self.p_key(key) is None:
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 836, in p_key
    self.addstr(key)
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 263, in addstr
    self.complete()
  File "/usr/lib/pymodules/python2.6/bpython/cli.py", line 360, in complete
    self.list_win_visible = Repl.complete(self, tab)
  File "/usr/lib/pymodules/python2.6/bpython/repl.py", line 519, in complete
    matches.extend(name + '=' for name in self.argspec[1][0]
  File "/usr/lib/pymodules/python2.6/bpython/repl.py", line 520, in <genexpr>
    if name.startswith(cw))
AttributeError: 'list' object has no attribute 'startswith'