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 form as a string.
  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>'