environment/lib/python2.7/site-packages/IPython/core/completer.py
def _default_arguments(self, obj):
        """Return the list of default arguments of obj if it is callable,
        or empty list otherwise."""

        if not (inspect.isfunction(obj) or inspect.ismethod(obj)):
            # for classes, check for __init__,__new__
            if inspect.isclass(obj):
                obj = (getattr(obj,'__init__',None) or
                       getattr(obj,'__new__',None))
            # for all others, check if they are __call__able
            elif hasattr(obj, '__call__'):
                obj = obj.__call__
            # XXX: is there a way to handle the builtins ?
        try:
            args,_,_1,defaults = inspect.getargspec(obj)
            if defaults:
                return args[-len(defaults):]
        except TypeError: pass
        return []
def _default_arguments(self, obj):
        """Return the list of default arguments of obj if it is callable,
        or empty list otherwise."""

        if not (inspect.isfunction(obj) or inspect.ismethod(obj)):
            # for classes, check for __init__,__new__
            if inspect.isclass(obj):
                obj = (getattr(obj,'__init__',None) or
                       getattr(obj,'__new__',None))
            # for all others, check if they are __call__able
            elif hasattr(obj, '__call__'):
                obj = obj.__call__
            # XXX: is there a way to handle the builtins ?
        try:
            args,_,_1,defaults = inspect.getargspec(obj)
            if defaults:
                return args[-len(defaults):]
        except TypeError: pass
        return []
Return the list of default arguments of obj if it is callable,
        or empty list otherwise.