input: Write a function to create an HTML form with a submit button to send information to a Python program. The function should return the HTML code of the form.
  assert create_html_form()=='''<form action="action.py" method="post">
      <input type="submit" value="Submit">
  </form>'''
output: def create_html_form():
      return '''<form action="action.py" method="post">
      <input type="submit" value="Submit">
  </form>'''