fix

python/paddle/fluid/io.py

@@ -618,10 +618,6 @@ def save_inference_model(dirname,
     if main_program is None:
         main_program = default_main_program()
 
-    if params_filename is not None:
-        params_filename = os.path.basename(params_filename)
-    save_persistables(executor, dirname, main_program, params_filename)
-
     # if there is lookup table, the trainer 0 will notify all pserver to save.
     if main_program._is_distributed and main_program._is_chief and main_program._distributed_lookup_table:
         lookup_table_filename = os.path.join(dirname, "__lookup_table__")
@@ -665,6 +661,10 @@ def save_inference_model(dirname,
         with open(model_basename + ".main_program", "wb") as f:
             f.write(main_program.desc.serialize_to_string())
 
+    if params_filename is not None:
+        params_filename = os.path.basename(params_filename)
+    save_persistables(executor, dirname, main_program, params_filename)
+
 
 def load_inference_model(dirname,
                          executor,