save model

recommend-model-produce/src/main/python/tools/static_ps_trainer_v2.py

@@ -256,7 +256,7 @@ class Main(object):
                 params_filename=None)
 
             feedvars = []
-            fetchvars = []
+            fetchvars = fetch_targets
 
             for var_name in feed_target_names:
                 if var_name not in program.global_block().vars: