code: def delete_element_when_value_none(data_structure):
      
      if isinstance(data_structure, list):
          for element in data_structure:
              delete_element_when_value_none(element)
      elif isinstance(data_structure, dict):
          for element in data_structure.keys():
              if data_structure[element] is None:
                  del data_structure[element]
              else:
                  delete_element_when_value_none(data_structure[element])
                  if len(data_structure[element]) == 0:
                          del data_structure[element]
docs: This method remove all entries in a Python dict when its value is None.
      :param data_structure: Python dict (lists are supported). e.i:
              [{"element1": "e1",
                "element2": {"element2.1": "e2",
                          "element2.2": None},
                "element3": "e3"},
              {"elementA": "eA",
               "elementB": {"elementB.1": None,
               "elementB2": ["a", "b"]}}]
      :return: None. The data_structure is modified