def __init__(self, interested=None):
        """interested - a sequence of features of a function to
        include in returned namedtuple. Allowed features:
            func, args, keywords, starargs, kwargs"""
        try:
            self._interested = set(interested)
        except TypeError:
            self._interested = interested
interested - a sequence of features of a function to
        include in returned namedtuple. Allowed features:
            func, args, keywords, starargs, kwargs
recipes/Python/576671_Parse_call_functiPy26_Py27_/recipe-576671.py