def _iget_item_cache(self, item):
    'Return the cached item, item represents a positional indexer.'
    ax = self._info_axis
    if ax.is_unique:
        lower = self._get_item_cache(ax[item])
    else:
        lower = self._take(item, axis=self._info_axis_number)
    return lower
Return the cached item, item represents a positional indexer.
def _iget_item_cache(self, item):
    
    ax = self._info_axis
    if ax.is_unique:
        lower = self._get_item_cache(ax[item])
    else:
        lower = self._take(item, axis=self._info_axis_number)
    return lower