code: def get_node(self, name, create=False):
          
  
          try:
              node = self.find_node(name, create)
          except KeyError:
              node = None
          return node
docs: Get a node in the zone, possibly creating it.
  
          This method is like L{find_node}, except it returns None instead
          of raising an exception if the node does not exist and creation
          has not been requested.
  
          @param name: the name of the node to find
          @type name: dns.name.Name object or string
          @param create: should the node be created if it doesn't exist?
          @type create: bool
          @rtype: dns.node.Node object or None