input: 
  def create_html_form(action: str) -> str:
      """Create an HTML form with a submit button to send information to a specified Python program.
      The form should be constructed with the specified action URL and a POST method.
      
      >>> create_html_form("action.py")
      '<form action="action.py" method="post"><input type="submit" value="Submit"></form>'
      """
  
output:     return f'<form action="{action}" method="post"><input type="submit" value="Submit"></form>'