GES graph node names issue

[kenneth-lee-ch]

Issue I was trying to use the ges function and evaluate its performance. It throws a KeyError due to None type in node_map inside the graph class output by GES (see 'Error messge'). I am wondering if the ges.py should provide an argument in the class to add nodenames like pc.py. I don't see anywhere in ges.py that updates the argument node_map in the estimated graph class. Since I got the same error with pc.py, but after providing a list of node names to node_names in pc.py, PC was working fine.

Data format snapshot

Code to reproduce

This is the code I used following the guidelines in the TestGES.py

ges_g = ges(X.to_numpy(), score_func='local_score_BDeu', maxP=None, parameters=None)
ges_ac = ArrowConfusion(true_cpdag, ges_g['G'])

Error message

Traceback (most recent call last):
  File "/Users/lee4094/Github/loci-po/experiment.py", line 443, in <module>
    ges_ac = ArrowConfusion(true_cpdag, ges_g['G'])
  File "/Users/lee4094/miniconda3/envs/locipo/lib/python3.10/site-packages/causallearn/graph/ArrowConfusion.py", line 45, in __init__
    if est.get_endpoint(est.get_node(nodes_name[i]), est.get_node(nodes_name[j])) == Endpoint.ARROW:
  File "/Users/lee4094/miniconda3/envs/locipo/lib/python3.10/site-packages/causallearn/graph/GeneralGraph.py", line 615, in get_endpoint
    edge = self.get_edge(node1, node2)
  File "/Users/lee4094/miniconda3/envs/locipo/lib/python3.10/site-packages/causallearn/graph/GeneralGraph.py", line 533, in get_edge
    i = self.node_map[node1]
KeyError: None

[kunwuz]

Thanks so much. Is this #130 (thanks to @Boyle-Coffee and @chenweiDelight) a solution of it?