If I want to expose the list with PythonCaller,I must expose elements of list. eg._listField{}.name,_listField{}.type
If can add "Lists to Expose" to Advanced Parameters,expose list will be easy better.
Add "Lists to Expose" to PythonCaller Parameters
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Think about it carefully, there is no good way to know what the elements of the
list before executing PythonCaller.