deal with case without fitting net

Author: ChiahsinChu

deepmd/pt/model/model/make_model.py

@@ -297,12 +297,13 @@ def forward_common_lower(
                 comm_dict=comm_dict,
             )
             # add weight to atomic_output
-            kw = self.atomic_model.fitting_net.var_name
-            if atomic_weight is not None:
-                # atomic_weight: nf x nloc x dim
-                atomic_ret[kw] = atomic_ret[kw] * atomic_weight.view(
-                    [atomic_ret[kw].shape[0], atomic_ret[kw].shape[1], -1]
-                )
+            if hasattr(self.atomic_model, "fitting_net"):
+                kw = self.atomic_model.fitting_net.var_name
+                if atomic_weight is not None:
+                    # atomic_weight: nf x nloc x dim
+                    atomic_ret[kw] = atomic_ret[kw] * atomic_weight.view(
+                        [atomic_ret[kw].shape[0], atomic_ret[kw].shape[1], -1]
+                    )
             model_predict = fit_output_to_model_output(
                 atomic_ret,
                 self.atomic_output_def(),