--------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-383-347ea2a5ae96> in <module>() 1 df = pd.DataFrame({pd.Interval(1, 2): [1, 2]}) 2 ----> 3 df.iloc[:, 0] += 0 //anaconda/envs/3.6/lib/python3.6/site-packages/pandas/core/indexing.py in __setitem__(self, key, value) 177 key = com._apply_if_callable(key, self.obj) 178 indexer = self._get_setitem_indexer(key) --> 179 self._setitem_with_indexer(indexer, value) 180 181 def _has_valid_type(self, k, axis): //anaconda/envs/3.6/lib/python3.6/site-packages/pandas/core/indexing.py in _setitem_with_indexer(self, indexer, value) 599 all(is_null_slice(idx) for i, idx in enumerate(indexer) 600 if i != info_axis) and item_labels.is_unique): --> 601 self.obj[item_labels[indexer[info_axis]]] = value 602 return 603 //anaconda/envs/3.6/lib/python3.6/site-packages/pandas/core/frame.py in __setitem__(self, key, value) 2329 else: 2330 # set column -> 2331 self._set_item(key, value) 2332 2333 def _setitem_slice(self, key, value): //anaconda/envs/3.6/lib/python3.6/site-packages/pandas/core/frame.py in _set_item(self, key, value) 2396 self._ensure_valid_index(value) 2397 value = self._sanitize_column(key, value) -> 2398 NDFrame._set_item(self, key, value) 2399 2400 # check if we are modifying a copy //anaconda/envs/3.6/lib/python3.6/site-packages/pandas/core/generic.py in _set_item(self, key, value) 1757 1758 def _set_item(self, key, value): -> 1759 self._data.set(key, value) 1760 self._clear_item_cache() 1761 //anaconda/envs/3.6/lib/python3.6/site-packages/pandas/core/internals.py in set(self, item, value, check) 3729 removed_blknos = [] 3730 for blkno, val_locs in _get_blkno_placements(blknos, len(self.blocks), -> 3731 group=True): 3732 blk = self.blocks[blkno] 3733 blk_locs = blklocs[val_locs.indexer] //anaconda/envs/3.6/lib/python3.6/site-packages/pandas/core/internals.py in _get_blkno_placements(blknos, blk_count, group) 4682 4683 # FIXME: blk_count is unused, but it may avoid the use of dicts in cython -> 4684 for blkno, indexer in lib.get_blkno_indexers(blknos, group): 4685 yield blkno, BlockPlacement(indexer) 4686 pandas/_libs/lib.pyx in pandas._libs.lib.get_blkno_indexers (pandas/_libs/lib.c:25817)() ValueError: Buffer has wrong number of dimensions (expected 1, got 0)