App Engine ndb StructuredProperty __get__

Question

OK, I'm stuck. I have a simple StructuredProperty (just one level deep) property on an entity. And at runtime, I want to get the value of one of the "sub-properties" on that StructuredProperty by name. For example;

class Address(ndb.Model):
  street = ndb.StringProperty()
  # ...

class Person(ndb.Model):
  # ...
  address = ndb.StructuredProperty(Address)

and then at runtime I want to be able to do something like:

prop = entity._properties['address']
sub_prop = prop.__getattr__('street')
value = sub_prop.__get__(entity, Person)

or get at it using GenericProperty or whatever works best. But I have tried a number of variations and I am clearly missing something. Of course the reason I want to do this is there are really a number of named Address -like StructuredProperty and I know which one I want based on runtime context.

Thanks for any help.

Answer 1

Bobby was right. I was getting at the property, not the property value the way I was thinking (long day).

The simple answer is

getattr(prop, 'some_name')