code: def append_dict_values(list_of_dicts, keys=None):
      
      if keys is None:
          keys = list(list_of_dicts[0].keys())
  
      dict_of_lists = DefaultOrderedDict(list)
      for d in list_of_dicts:
          for k in keys:
              dict_of_lists[k].append(d[k])
      return dict_of_lists
docs: Return a dict of lists from a list of dicts with the same keys.
      For each dict in list_of_dicts with look for the values of the
      given keys and append it to the output dict.
  
      Parameters
      ----------
      list_of_dicts: list of dicts
  
      keys: list of str
          List of keys to create in the output dict
          If None will use all keys in the first element of list_of_dicts
      Returns
      -------
      DefaultOrderedDict of lists