In [100]: H.nodes.filterby_attr('color', 'purple') - H.nodes.filterby_attr('name', 'Elena')
------------------------------------------------------------------------
AttributeError                         Traceback (most recent call last)
<ipython-input-125-d1330d064101> in <module>
----> 1 H.nodes.filterby_attr('color', 'purple') - H.nodes.filterby_attr('name', 'Elena')

/usr/lib/python3.8/_collections_abc.py in __sub__(self, other)
    499                 return NotImplemented
    500             other = self._from_iterable(other)
--> 501         return self._from_iterable(value for value in self
    502                                    if value not in other)
    503 

/usr/lib/python3.8/_collections_abc.py in _from_iterable(cls, it)
    470         does not accept an iterable for an input.
    471         '''
--> 472         return cls(it)
    473 
    474     def __and__(self, other):

~/code/xgi/xgi/classes/reportviews.py in __init__(self, H, bunch)
    524         else:
    525             super().__init__(
--> 526                 H._node, H._node_attr, H._edge, H._edge_attr, dispatcher, bunch
    527             )
    528 

AttributeError: 'generator' object has no attribute '_node'