def ix(self): if self._ix is None: self._ix = _NDFrameIndexer(self) return self._ix
def ix(self): if self._ix is None: self._ix = _NDFrameIndexer(self) return self._ix
def ix(self): if self._ix is None: self._ix = _NDFrameIndexer(self) return self._ix
def ix(self): if self._ix is None: self._ix = _NDFrameIndexer(self) return self._ix