Instantiating sub-class from super

Mon Oct 14 16:55:05 EDT 2019

Is there a technique or pattern for taking a (partially-) populated 
instance of a class, and re-creating it as an instance of one of its 
sub-classes?
In a medically-oriented situation, we have a Person() class, and start 
collecting information within an instance (person = Person(), etc).
During the data-collection process the person's sex may become obvious, 
eg few males have become/been pregnant.
We could stick with Person() and implement specific methods therein, 
rather than separate Man and Woman sub-classes, but...
It seemed better (at the design-level) to have Man( Person ) and Woman( 
Person ) sub-classes to contain the pertinent attributes, source more 
detailed and specific questions, and collect such data; by gender.
In coding-practice, once gender becomes apparent, how should the 
instance of the Man() or Woman() sub-class be created - and established 
with the ID and other attributes previously collected as a Person instance?
This attempt seems hack-y:
	man = Man()
	man.__dict__.update( person.__dict__ )
Is there a pythonic tool for such, or is the task outlined 
fundamentally-inappropriate?
-- 
Regards,
=dn