code: def load_vasp_summary( filename ):
      
      with open( filename, 'r' ) as stream:
          docs = yaml.load_all( stream, Loader=yaml.SafeLoader )
          data = { d['title']: d for d in docs }
      return data
docs: Reads a `vasp_summary.yaml` format YAML file and returns
      a dictionary of dictionaries. Each YAML document in the file
      corresponds to one sub-dictionary, with the corresponding
      top-level key given by the `title` value.
  
      Example:
          The file:
      
              ---
              title: foo
              data: foo_data
              ---
              title: bar
              data: bar_data
  
          is converted to the dictionary
  
              { 'foo': { 'title': 'foo', 'data': 'foo_data' },
                'bar': { 'title': 'bar', 'data': 'bar_data' } }
  
      Args:
          filename (str): File path for the `vasp_summary.yaml` file.
  
      Returns:
          dict(dict,dict,...): A dictionary of separate YAML documents,
              each as dictionaries.a