code: def main():
      parser = argparse.ArgumentParser()
      parser.add_argument("--check", action="store_true")
  
      args = parser.parse_args()
  
      output = subprocess.check_output(
          ["text-generation-launcher", "--help"]
      ).decode("utf-8")
  
      wrap_code_blocks_flag = "<!-- WRAP CODE BLOCKS -->"
      final_doc = f"# Text-generation-launcher arguments\n\n{wrap_code_blocks_flag}\n\n"
  
      lines = output.split("\n")
  
      header = ""
      block = []
      for line in lines:
          if line.startswith("  -") or line.startswith("      -"):
              rendered_block = "\n".join(block)
              if header:
                  final_doc += (
                      f"## {header}\n```shell\n{rendered_block}\n```\n"
                  )
              else:
                  final_doc += f"```shell\n{rendered_block}\n```\n"
              block = []
              tokens = line.split("<")
              if len(tokens) > 1:
                  header = tokens[-1][:-1]
              else:
                  header = line.split("--")[-1]
              header = header.upper().replace("-", "_")
  
          block.append(line)
  
      rendered_block = "\n".join(block)
      final_doc += f"## {header}\n```shell\n{rendered_block}\n```\n"
      block = []
  
      filename = "docs/source/basic_tutorials/launcher.md"
      if args.check:
          with open(filename, "r") as f:
              doc = f.read()
              if doc != final_doc:
                  tmp = "launcher.md"
                  with open(tmp, "w") as g:
                      g.write(final_doc)
                  diff = subprocess.run(
                      ["diff", tmp, filename], capture_output=True
                  ).stdout.decode("utf-8")
                  print(diff)
                  raise Exception(
                      "Doc is not up-to-date, run `python update_doc.py` in order to update it"
                  )
      else:
          with open(filename, "w") as f:
              f.write(final_doc)
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types