Connor Skennerton created TINKERPOP-2395:
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Summary: Gremlin Python doesn't support list as keys in groupCount
Key: TINKERPOP-2395
URL: https://issues.apache.org/jira/browse/TINKERPOP-2395
Project: TinkerPop
Issue Type: Bug
Components: python
Affects Versions: 3.4.7
Reporter: Connor Skennerton
The following works fine in the console but fails when converted to python.
{code:java}
graph = TinkerGraph.open()
g = graph.traversal()
g.addV('test').property(set, 'name', 'name1').property(set, 'name', 'name2')
g.addV('test').property(set, 'name', 'name1').property(set, 'name', 'name2')
g.addV('source').property(set, 'name', 'source')
g.V(0L).as('0').V(3L).as('3').V(6L).as('6').addE('root').from('6').to('0').addE('root').from('6').to('3')
g.V().has('name', 'source').out('root').groupCount().by(values('name').fold())
==>[[name1,name2]:2]
{code}
The stack trace from python is as follows
{code:java}
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/driver/connection.py",
line 83, in _receive
status_code = self._protocol.data_received(data, self._results)
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/driver/protocol.py",
line 83, in data_received
message = self._message_serializer.deserialize_message(message)
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/driver/serializer.py",
line 163, in deserialize_message
return self._graphson_reader.toObject(msg)
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 129, in toObject
return dict((self.toObject(k), self.toObject(v)) for k, v in obj.items())
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 129, in <genexpr>
return dict((self.toObject(k), self.toObject(v)) for k, v in obj.items())
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 129, in toObject
return dict((self.toObject(k), self.toObject(v)) for k, v in obj.items())
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 129, in <genexpr>
return dict((self.toObject(k), self.toObject(v)) for k, v in obj.items())
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 126, in toObject
return
self.deserializers[obj[GraphSONUtil.TYPE_KEY]].objectify(obj[GraphSONUtil.VALUE_KEY],
self)
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 432, in objectify
new_list.append(reader.toObject(obj))
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 126, in toObject
return
self.deserializers[obj[GraphSONUtil.TYPE_KEY]].objectify(obj[GraphSONUtil.VALUE_KEY],
self)
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 269, in objectify
return Traverser(reader.toObject(d["value"]),
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 126, in toObject
return
self.deserializers[obj[GraphSONUtil.TYPE_KEY]].objectify(obj[GraphSONUtil.VALUE_KEY],
self)
File
"/Users/connor.skennerton/.pyenv/versions/dogma/lib/python3.6/site-packages/gremlin_python/structure/io/graphsonV3d0.py",
line 484, in objectify
new_dict[reader.toObject(l[x])] = reader.toObject(l[x + 1])
TypeError: unhashable type: 'list'
{code}
Python allows tuples (but not lists) to be used as dictionary keys.
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