Class factory in Python

Question

I\'m new to Python and need some advice implementing the scenario below.

I have two classes for managing domains at two different registrars. Both have the same inte

Answer 1

In Python you can change the actual class directly:

class Domain(object):
  def __init__(self, domain):
    self.domain = domain
    if ...:
      self.__class__ = RegistrarA
    else:
      self.__class__ = RegistrarB

And then following will work.

com = Domain('test.com') #load RegistrarA
com.lookup()

I'm using this approach successfully.