Simplify hubconf

Summary: Pull Request resolved: https://github.com/fairinternal/fairseq-py/pull/758

Differential Revision: D16418932

Pulled By: myleott

fbshipit-source-id: 59f005164b61b9fa712922eeb23525f7eec38f38

hubconf.py

@@ -5,6 +5,8 @@
 # the root directory of this source tree. An additional grant of patent rights
 # can be found in the PATENTS file in the same directory.
 
+import functools
+
 from fairseq.models import MODEL_REGISTRY
 
 
@@ -18,5 +20,11 @@ dependencies = [
 ]
 
 
-for model, cls in MODEL_REGISTRY.items():
-    globals()[model] = cls.from_pretrained
+for model_type, _cls in MODEL_REGISTRY.items():
+    for model_name in _cls.hub_models().keys():
+        globals()[model_name] = functools.partial(
+            _cls.from_pretrained,
+            model_name_or_path=model_name,
+        )
+    # to simplify the interface we only expose named models
+    #globals()[model_type] = _cls.from_pretrained