open file only once

python/damask/_result.py

@@ -1059,6 +1059,7 @@ class Result:
         attributes = []
         data_items = []
 
+        with h5py.File(self.fname,'r') as f:
             for inc in self.visible['increments']:
 
                 grid=ET.SubElement(collection,'Grid')
@@ -1084,8 +1085,6 @@ class Result:
                               'Dimensions': '3'}
                 delta.text="{} {} {}".format(*(self.size/self.cells))
 
-
-            with h5py.File(self.fname,'r') as f:
                 attributes.append(ET.SubElement(grid, 'Attribute'))
                 attributes[-1].attrib={'Name':          'u / m',
                                        'Center':        'Node',