khannaekta commented on a change in pull request #560:
URL: https://github.com/apache/madlib/pull/560#discussion_r591731136



##########
File path: src/ports/postgres/modules/deep_learning/madlib_keras_wrapper.py_in
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@@ -440,16 +444,16 @@ def get_custom_functions_list(compile_params):
 
     """
     compile_dict = convert_string_of_args_to_dict(compile_params)
-    builtin_losses = dir(losses)
+    builtin_losses = update_builtin_losses(dir(losses))
     builtin_metrics = update_builtin_metrics(dir(metrics))
 
     custom_fn_list = []
     local_loss = compile_dict['loss'].lower() if 'loss' in compile_dict else 
None
-    local_metric = compile_dict['metrics'].lower()[2:-2] if 'metrics' in 
compile_dict else None
+    metric_list = ast.literal_eval(compile_dict['metrics'].lower()) if 
'metrics' in compile_dict else []

Review comment:
       Sounds good. Yes, I think we should add the similar try/catch for better 
error msg. 




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