single elements of numpy arrays are not of native type

python/damask/_config.py

@@ -41,8 +41,10 @@ class NiceDumper(yaml.SafeDumper):
             return self.represent_data(data.tolist())
         if isinstance(data, Rotation):
             return self.represent_data(data.quaternion.tolist())
-        else:
-            return super().represent_data(data)
+        if hasattr(data, 'dtype'):
+            return self.represent_data(data.item())
+
+        return super().represent_data(data)
 
     def ignore_aliases(self,
                        data: Any) -> bool:

python/tests/test_Config.py

@@ -46,7 +46,8 @@ class TestConfig:
         assert Config.load(tmp_path/'config.yaml') == config
 
     def test_numpy(self,tmp_path):
-        assert Config({'A':np.ones(3,'i')}).__repr__() == Config({'A':[1,1,1]}).__repr__()
+        assert Config({'A':np.ones(3,'i'), 'B':np.ones(1)[0]}).__repr__() == \
+               Config({'A':[1,1,1],        'B':1.0}).__repr__()
 
     def test_abstract_is_valid(self):
         with pytest.raises(NotImplementedError):