def _get_item_cache(self, item):
    'Return the cached item, item represents a label indexer.'
    cache = self._item_cache
    res = cache.get(item)
    if (res is None):
        values = self._data.get(item)
        res = self._box_item_values(item, values)
        cache[item] = res
        res._set_as_cached(item, self)
        res._is_copy = self._is_copy
    return res
Return the cached item, item represents a label indexer.
def _get_item_cache(self, item):
    
    cache = self._item_cache
    res = cache.get(item)
    if (res is None):
        values = self._data.get(item)
        res = self._box_item_values(item, values)
        cache[item] = res
        res._set_as_cached(item, self)
        res._is_copy = self._is_copy
    return res