code: def options(self):
          '''
          Yields `(raw_value, label)` pairs for all acceptable choices.
          '''
          conv = self.conv
          for python_value, label in self.choices:
              yield conv.from_python(python_value), labef options(self):
          '''
          Yields `(raw_value, label)` pairs for all acceptable choices.
          '''
          conv = self.conv
          for python_value, label in self.choices:
              yield conv.from_python(python_value), label
docs: Yields `(raw_value, label)` pairs for all acceptable choices.