Fix defaults for init

mc4-sampling.py

@@ -300,13 +300,20 @@ class Mc4Sampling(datasets.GeneratorBasedBuilder):
             else:
                 # Loading 5-gram model
                 # http://dl.fbaipublicfiles.com/cc_net/lm/es.arpa.bin
-                logger.info("loading model = %s", self.perplexity_model)
-                self.pp_model = kenlm.Model(self.perplexity_model)
+                logger.info("loading model = %s", str(self.perplexity_model))
+                if isinstance(self.perplexity_model, str):
+                    self.pp_model = kenlm.Model(self.perplexity_model)
+                else:
+                    self.pp_model = self.perplexity_model
                 if self.sampling_method == "gaussian":
                     self.should_keep_doc = self._should_keep_doc_gaussian
                 else:
                     self.should_keep_doc = self._should_keep_doc_step
-        super().__init__(*args, writer_batch_size=writer_batch_size, **kwargs)
+        init_kwargs = {
+            prop: kwargs.get(prop)
+            for prop in ("name", "version", "data_dir", "data_files", "description")
+        }
+        super().__init__(*args, writer_batch_size=writer_batch_size, **init_kwargs)
 
     def get_perplexity(self, doc):
         doc_log_score, doc_length = 0, 0