code: def fill_in_textfield(self, field_name, value):
      
  
      date_field = find_any_field(world.browser,
                                  DATE_FIELDS,
                                  field_name)
      if date_field:
          field = date_field
      else:
          field = find_any_field(world.browser,
                                 TEXT_FIELDS,
                                 field_name)
  
      if not field:
          raise AssertionError(
              "Cannot find a field named '{}'.".format(field_name))
  
      if date_field:
          field.send_keys(Keys.DELETE)
      else:
          field.clear()
  
      field.send_keys(value)
docs: Fill in the HTML input with given label (recommended), name or id with
      the given text.
  
      Supported input types are text, textarea, password, month, time, week,
      number, range, email, url, tel and color.