• test.py 
      #!/usr/bin/env python3
  """
  CGI bin test script.
  """
  response = """\
  <!DOCTYPE html>
  <html>

  <body>
      <h2>Hello, world!</h2>

  </body>

  </html>
  """

  print("Content-Type: text/html")
  print("")
  print(response)