speakerlater.py python3 failed

[o3o3o]

Firstly, I face the problem: infinite recursion bug when func raises AttributeError.

Then I modified the speaklater.py with the diff.

here is errors:

raise RuntimeError("Suppressed AttributeError: " + str(e)) 
RuntimeError: Suppressed AttributeError: 'NullTranslations' object has no attribute 'ugettext'

The error code is here:

  def translate(self, message, _locale, plural_message=None, count=None):
      if plural_message is not None:
          assert count is not None
          # sefl.translations is NullTranslations
          return self.translations.ungettext(message, plural_message, count) 
      else:
          return self.translations.ugettext(message)

So, I think it is affected by the babel version. Now I am using Babel 2.3.4.

Could you tell me your Babel version, So I can get diff the old babel and new babel code. ?