The 'graph' attribute isn't present in `G.nx`

Via @MikeB2019x:

@j6k4m8 screenshare not required at the moment but I may take you up on that in the future. So trying to write out a graphml as suggested throws an error (stack trace below). If I compare a networkx graph's attributes and those of G.nx, you'll see: [...,'edges', 'get_edge_data','graph','graph_attr_dict_factory','has_edge','has_node'...] for the former compared to [...'edges','get_edge_data','graph_attr_dict_factory','has_edge','has_node',...] for the latter. That is, the 'graph' attribute isn't present in G.nx. I'm guessing that's intentional?

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Input In [35], in <module>
      1 graphml_file_name = 'graphtools.graphml'
----> 3 nx.write_graphml(G.nx, graphml_file_name)

File <class 'networkx.utils.decorators.argmap'> compilation 17:5, in argmap_write_graphml_lxml_13(G, path, encoding, prettyprint, infer_numeric_types, named_key_ids, edge_id_from_attribute)
      3 from contextlib import contextmanager
      4 from pathlib import Path
----> 5 import warnings
      7 import networkx as nx
      8 from networkx.utils import create_random_state, create_py_random_state

File ~/opt/miniconda3/envs/graph_analytics/lib/python3.8/site-packages/networkx/readwrite/graphml.py:171, in write_graphml_lxml(G, path, encoding, prettyprint, infer_numeric_types, named_key_ids, edge_id_from_attribute)
    160 except ImportError:
    161     return write_graphml_xml(
    162         G,
    163         path,
   (...)
    168         edge_id_from_attribute,
    169     )
--> 171 writer = GraphMLWriterLxml(
    172     path,
    173     graph=G,
    174     encoding=encoding,
    175     prettyprint=prettyprint,
    176     infer_numeric_types=infer_numeric_types,
    177     named_key_ids=named_key_ids,
    178     edge_id_from_attribute=edge_id_from_attribute,
    179 )
    180 writer.dump()

File ~/opt/miniconda3/envs/graph_analytics/lib/python3.8/site-packages/networkx/readwrite/graphml.py:729, in GraphMLWriterLxml.__init__(self, path, graph, encoding, prettyprint, infer_numeric_types, named_key_ids, edge_id_from_attribute)
    726 self.attribute_types = defaultdict(set)
    728 if graph is not None:
--> 729     self.add_graph_element(graph)

File ~/opt/miniconda3/envs/graph_analytics/lib/python3.8/site-packages/networkx/readwrite/graphml.py:740, in GraphMLWriterLxml.add_graph_element(self, G)
    737 else:
    738     default_edge_type = "undirected"
--> 740 graphid = G.graph.pop("id", None)
    741 if graphid is None:
    742     graph_element = self._xml.element("graph", edgedefault=default_edge_type)

AttributeError: 'NetworkXDialect' object has no attribute 'graph'

Originally posted by @MikeB2019x in https://github.com/aplbrain/grand/issues/35#issuecomment-1151569901

aplbrain / grand

The 'graph' attribute isn't present in `G.nx` #39