graph-edit example from README: TypeError: 'method' object is not iterable about gmatch4py HOT 2 OPEN

Python 3.8.5 (default, Jul 21 2020, 10:48:26)
[Clang 11.0.3 (clang-1103.0.32.62)] on darwin
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>>> # Gmatch4py use networkx graph
>>> import networkx as nx
>>> # import the GED using the munkres algorithm
>>> import gmatch4py as gm
<frozen importlib._bootstrap>:219: UserWarning: To obtain optimal results install the Cython 'munkres' module at  https://github.com/jfrelinger/cython-munkres-wrapper
g1=nx.complete_bipartite_graph(5,4)
g2=nx.complete_bipartite_graph(6,4)
ged=gm.GraphEditDistance(1,1,1,1) # all edit costs are equal to 1
result=ged.compare([g1,g2],None)
print(result)
>>> g1=nx.complete_bipartite_graph(5,4)
>>> g2=nx.complete_bipartite_graph(6,4)
>>> ged=gm.GraphEditDistance(1,1,1,1) # all edit costs are equal to 1
>>> result=ged.compare([g1,g2],None)
>>> print(result)
[[ 0. 14.]
 [10.  0.]]
>>>