code: def main():
      with open(filename, "r") as f:
          lines = f.read().split("\n")[:-1]
      new_lines = []
      for line in lines:
          if "\xa0" in line:
              line = line.strip("\xa0")
          if "\u200b" in line:
              line = line.replace("\u200b", "")
          if "\u200c" in line:
              line = line.replace("\u200c", "")
          skip_sentence = False
          for ch in ["#", "\\", "[", ":", "'"]:
              if ch in line:
                  skip_sentence = True
          if skip_sentence:
              continue
          is_alpha = re.search("[a-zA-Z]", line)
          if is_alpha is not None:
              continue
          line = re.sub(" +", " ", line)
          new_lines.append(line)
  
      with open(filename, "w") as f:
          for line in new_lines:
              f.write(line + "\n")
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types