reading a GML file with networkx (python) without labels for the nodes -


i have long gml file (graph modelling language) trying read networkx in python. in gml file, nodes don't have label, this:

graph [   node [     id 1   ]   node [     id 2   ]   edge [     source 2     target 1     ]   ]

i error when reading file: g = nx.read_gml('simple_graph.gml')

--------------------------------------------------------------------------- networkxerror                             traceback (most recent call last) <ipython-input-39-b1b319a08668> in <module>() ----> 1 g = nx.read_gml('simple_graph.gml')  <decorator-gen-319> in read_gml(path, label, destringizer)  /usr/lib/python2.7/dist-packages/networkx/utils/decorators.pyc in _open_file(func, *args, **kwargs)     218         # finally, call original function, making sure close fobj.     219         try: --> 220             result = func(*new_args, **kwargs)     221         finally:     222             if close_fobj:  /usr/lib/python2.7/dist-packages/networkx/readwrite/gml.pyc in read_gml(path, label, destringizer)     208             yield line     209  --> 210     g = parse_gml_lines(filter_lines(path), label, destringizer)     211     return g     212   /usr/lib/python2.7/dist-packages/networkx/readwrite/gml.pyc in parse_gml_lines(lines, label, destringizer)     407             raise networkxerror('node id %r duplicated' % (id,))     408         if label != 'id': --> 409             label = pop_attr(node, 'node', 'label', i)     410             if label in labels:     411                 raise networkxerror('node label %r duplicated' % (label,))  /usr/lib/python2.7/dist-packages/networkx/readwrite/gml.pyc in pop_attr(dct, type, attr, i)     397         except keyerror:     398             raise networkxerror( --> 399                 "%s #%d has no '%s' attribute" % (type, i, attr))     400      401     nodes = graph.get('node', [])  networkxerror: node #0 has no 'label' attribute

i see complains because nodes don't have labels. documentation of gml thought labels not obligatory (maybe i'm wrong?). there way read such file without labels? or should change gml file? thank help!

if want use id attribute in gml labeling nodes, can designate label attribute nx.read_gml argument follows.

g = nx.read_gml('simple_graph.gml', label='id')

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