code: def replace_rdataset(self, name, replacement):
          
  
          if replacement.rdclass != self.rdclass:
              raise ValueError('replacement.rdclass != zone.rdclass')
          node = self.find_node(name, True)
          node.replace_rdataset(replacement)
docs: Replace an rdataset at name.
  
          It is not an error if there is no rdataset matching I{replacement}.
  
          Ownership of the I{replacement} object is transferred to the zone;
          in other words, this method does not store a copy of I{replacement}
          at the node, it stores I{replacement} itself.
  
          If the I{name} node does not exist, it is created.
  
          @param name: the owner name
          @type name: DNS.name.Name object or string
          @param replacement: the replacement rdataset
          @type replacement: dns.rdataset.Rdataset