code: def submit_button(*args, **kwargs):
      '''
      Create a submit button
      '''
      submit_button = wtforms.SubmitField(*args, **kwargs)
      submit_button.input_type = 'submit_button'
      return submit_buttof submit_button(*args, **kwargs):
      '''
      Create a submit button
      '''
      submit_button = wtforms.SubmitField(*args, **kwargs)
      submit_button.input_type = 'submit_button'
      return submit_button
docs: Create a submit button