code: def _getitem_list_str(items, key):
      filtered = []
      for item in items:
          try:
              filtered.append(item[key])
          except KeyError:
              continue
      if items and not filtered:
          return _none
      return filtered
  
imports: import json
  import pickle
  from skorch.utils import open_file_like
label_desc: Use image node_id 4 for calling a global function with example usage: _getitem_list_str(items, key) and returns: filtered, _none