code: def normalize_string_list(str_list: str) -> List[str]:
      ret_list = []
      for _str in str_list:
          normalize_str = StringUtils.normalize_str(_str)
          if normalize_str != "":
              ret_list.append(normalize_str)
      return ret_list
  
file_path: nlp-architect/nlp_architect/utils/string_utils.py
imports: import os
  import re
  import string
  from typing import List
  from nlp_architect.utils.io import load_json_file
  from nlp_architect.utils.text import SpacyInstance
label_desc: Use image node_id 7 for calling the StringUtils obj's underlying member method code with example usage: obj.normalize_string_list(str_list) and returns: ret_list