code: def space_list(line: str) -> List[int]:
      """
      Given a string, return a list of index positions where a blank space occurs.
  
      :param line:
      :return:
  
      >>> space_list("    abc ")
      [0, 1, 2, 3, 7]
      """
      spaces = []
      for idx, car in enumerate(list(line)):
          if car == " ":
              spaces.append(idx)
      return spaces
  
imports: import re
  import sys
  import unicodedata
  from typing import Dict, List, Tuple
label_desc: Use image node_id 5 for calling a global function with example usage: space_list(line) and returns: spaces