def new_frame(self, *args):
        # args must be filename, firstlineno, funcname
        # our code objects are cached since we don't need to create
        # new ones every time
        try:
            code = self._code[args]
        except __HOLE__:
            code = FakeCode(*args)
            self._code[args] = code
        # frame objects are create fresh, since the back pointer will
        # vary considerably
        if self._stack:
            back = self._stack[-1]
        else:
            back = None
        frame = FakeFrame(code, back)
        self._stack.append(frame)
        return frame
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/python/Lib/hotshot/stats.py/StatsLoader.new_frame