[TINKERPOP-2493] PythonTranslator should default to gremlin-groovy for lambdas

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 3.4.9
• Component/s: translator
• Assignee: Unassigned
• Reporter: Stephen Mallette
• Created: 18/Dec/20 17:01
• Updated: 29/Dec/20 17:34
• Resolved: 29/Dec/20 17:34

Description

The Java PythonTranslator is generating the following by default:

gremlin> pythonTranslator.translate(g.V().has("person",'name','marko').map(Lambda.function("x -> x.get()"))).script
==>g.V().has('person','name','marko').map(lambda x -> x.get())

which is a native python lambda but in 3.5.0 the PythonScriptEngine is dead (and likely never what the user would want/expect. We need to generate gremlin-groovy by default and therefore:

gremlin> pythonTranslator.translate(g.V().has("person",'name','marko').map(Lambda.function("x -> x.get()"))).script
==>g.V().has('person','name','marko').map(lambda:  "x -> x.get()")