[pre-commit.ci] auto fixes from pre-commit.com hooks

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deepmd/pt/model/model/property_model.py

@@ -81,7 +81,7 @@ def get_intensive(self) -> bool:
     @torch.jit.export
     def get_var_name(self) -> str:
         """Get the name of the property."""
-        if hasattr(obj, 'get_var_name') and callable(getattr(obj, 'get_var_name')):
+        if hasattr(obj, "get_var_name") and callable(getattr(obj, "get_var_name")):
             return self.get_fitting_net().var_name
         else:
             raise NotImplementedError