code: def is_subdomain(self, other):
          
          compared = other.value if hasattr(other, 'value') else other
          try:
              return self.value.is_subdomain(compared)
          except AttributeError:
              return False
docs: Test if the object is a subdomain of the other.
  
          :param other: the object to which we compare this instance
          :returns: True if this instance is a subdomain of the other