input: 
  from typing import List
  
  def create_html_form() -> str:
      """ Creates an HTML form with a submit button to send information to a Python program.
      The form should have a post method and action directed to 'action.py'.
      >>> create_html_form()
      "<form action='action.py' method='post'><input type='submit' value='Submit'></form>"
      """
  
output:     return "<form action='action.py' method='post'><input type='submit' value='Submit'></form>"