I am aware of how to convert the strings posted from my form to some of the common types, eg (Boolean and Integer):
age = int(self.request.get("age")) #convert to integer
opt_in = self.request.get("opt_in") == 'on' #convert to boolean
My questions is how about how to convert to some of the less common types, ie 1. EmailProperty 2. FloatProperty 3. PhoneNumberProperty 4. DateProperty