code: def similarity_lookup(self, ResponseGroup="Large", **kwargs):
          
          response = self.api.SimilarityLookup(
              ResponseGroup=ResponseGroup, **kwargs)
          root = objectify.fromstring(response)
          if root.Items.Request.IsValid == 'False':
              code = root.Items.Request.Errors.Error.Code
              msg = root.Items.Request.Errors.Error.Message
              raise SimilartyLookupException(
                  "Amazon Similarty Lookup Error: '{0}', '{1}'".format(
                      code, msg))
          return [
              AmazonProduct(
                  item,
                  self.aws_associate_tag,
                  self.api,
                  region=self.region
              )
              for item in getattr(root.Items, 'Item', [])
          ]
docs: Similarty Lookup.
  
          Returns up to ten products that are similar to all items
          specified in the request.
  
          Example:
              >>> api.similarity_lookup(ItemId='B002L3XLBO,B000LQTBKI')