Using Any compound validation

I was trying to do something like this for my validation:
chained_validators = [Any(NotEmpty('modulenamelist'), NotEmpty('modulename'))]

But NotEmpty does not support specifying the field names?

I am trying to make something like Field A or Field B must have some
valid input in it but both must not be empty. One can be empty if the
other has valid input.

I found the Any compound validator and this seemed to be what I need
but as you can see I hit a brick wall.

-- 
Thanks, Richie Ward

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