Example of classes with dynamically selectors in python

Dyn.py

class Http_Server(object):
  environment = {}

  def __init__(self, env):
    self.environment = env
    print self.environment
    # Dynamically fetch the environments variables for the operating system
    self.os = getattr(__import__('enheritage'), self.environment.get('os', 'Debian'))

  def reload(self):
    raise NotImplementedError

  def restart(self):
    raise NotImplementedError

  def graceful(self):
    raise NotImplementedError

  def create_directories(self):
    raise NotImplementedError


class Apache(Http_Server):

  def restart(self):
    pass

  def reload(self):
    pass

  def graceful(self):
    pass


class Nginx(Http_Server):

  def restart(self):
    pass

  def reload(self):
    pass

  def graceful(self):
    pass


class Environments(object):
    
  def __init__(self, configuration):
    self.executablePath = configuration.get('exec', '')

class Debian(Environments):
  current_name='ubuntu_12.04'
  pass

class RedHat(Environments):
  current_name='RH_1010'
  pass


if __name__ == '__main__':
  environ = {'test': 'test', 'os': 'Debian'}
  apache = Apache(environ)
  print apache.os.current_name