I am trying to define custom slot mappings by writing a FormValidationAction (as described in the docs here: shorturl.at/bitS5). However, when I run rasa actions I get NameError: name 'Optional' is not defined. I simply copied and edited the code snippet from the docs, so I don’t see why I should be getting this error. But what is even more confusing to me is that removing the function annotations don’t fix the problem — instead I get syntax errors. Function annotations are purely optional in Python, and that’s what I understand this method header to be. But there is clearly something more going on that I’m not understanding. I’ve attached the full error message as well as my actions.py file. [Screen Shot 2020-12-13 at 12.41.48 AM] actions.py (5.7 KB)

FormValidationAction method header produces NameError

ChikkaUdayaSai (Uday) December 13, 2020, 8:29am 2

Add the below statement at the beginning of your actions file.

from typing import Optional

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