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Branden Moore commented on TINKERPOP-1896: ------------------------------------------ I view the DSLs as extensions to the Gremlin language, rather than a replacement of said language. If a DSL is an extension to the language, than from the user of said extended language, they would expect the existing language constructs to continue to exist. Do you consider '__' to be part of the language of Gremlin? Given how pervasive it is, I certainly would consider it part of the language. Should all DSLs tell their users to avoid using '__', but rather some DSL-specific key? Also, what happens when a user of the DSL (especially with GroovyGremlin) forgets to always start anonymous traversals with the DSL's version of __, and just allows the static import to fire? Well, it would get the non-DSL version of __, I believe, which will cause much confusion. This discussion is now well off-base now from where this ticket started. Perhaps we should move conversation to the mailing list instead? > gremlin-python lambdas error when working on Maps > ------------------------------------------------- > > Key: TINKERPOP-1896 > URL: https://issues.apache.org/jira/browse/TINKERPOP-1896 > Project: TinkerPop > Issue Type: Bug > Components: python > Affects Versions: 3.3.1 > Reporter: Branden Moore > Priority: Major > Fix For: 3.2.8, 3.3.2 > > > Gremlin-python lambdas throw an error on the server when the preceding step > produces maps. > {code} > Traceback (most recent call last): > File "foo.py", line 15, in <module> > print g.V().has('name').match(__.as_('x').label().as_('lbl'), > __.as_('x').id().as_('id')).select('lbl', 'id').map(lambda: "lambda x: > type(x)").toList() > File > "/user/.local/lib/python2.7/site-packages/gremlin_python/process/traversal.py", > line 52, in toList > return list(iter(self)) > File > "/user/.local/lib/python2.7/site-packages/gremlin_python/process/traversal.py", > line 70, in next > return self.__next__() > File > "/user/.local/lib/python2.7/site-packages/gremlin_python/process/traversal.py", > line 43, in __next__ > self.traversal_strategies.apply_strategies(self) > File > "/user/.local/lib/python2.7/site-packages/gremlin_python/process/traversal.py", > line 352, in apply_strategies > traversal_strategy.apply(traversal) > File > "/user/.local/lib/python2.7/site-packages/gremlin_python/driver/remote_connection.py", > line 143, in apply > remote_traversal = self.remote_connection.submit(traversal.bytecode) > File > "/user/.local/lib/python2.7/site-packages/gremlin_python/driver/driver_remote_connection.py", > line 54, in submit > results = result_set.all().result() > File > "/user/.local/lib/python2.7/site-packages/concurrent/futures/_base.py", line > 462, in result > return self.__get_result() > File > "/user/.local/lib/python2.7/site-packages/concurrent/futures/_base.py", line > 414, in __get_result > raise exception_type, self._exception, self._traceback > gremlin_python.driver.protocol.GremlinServerError: 599: AttributeError: type > object 'org.apache.tinkerpop.gremlin.process.traversal.dsl' has no attribute > 'as_' in <script> at line number 1 > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)