Mark Python tests that need network access

Author: gordonmessmer

bindings/python/tests/documentation/test_tutorial_train_from_iterators.py

@@ -62,6 +62,7 @@ def test_train_basic(self):
         tokenizer.train_from_iterator(data, trainer=trainer)
         # END train_basic
 
+    @pytest.mark.network
     def test_datasets(self):
         tokenizer, trainer = self.get_tokenizer_trainer()