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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _language_to_voice_code(self, language):
 """ Translate a language value to a voice code. If you want to mock support for a language by using a voice for a similar language, please add it to the ``LANGUAGE_TO_VOICE_CODE`` dictionary. :param language: the requested language :type language: :class:`~aeneas.language.Language` :rtype: string """

        voice_code = self.rconf[RuntimeConfiguration.TTS_VOICE_CODE]
        if voice_code is None:
            try:
                voice_code = self.LANGUAGE_TO_VOICE_CODE[language]
            except KeyError as exc:
                self.log_exc(u"Language code '%s' not found in LANGUAGE_TO_VOICE_CODE" % (language), exc, False, None)
                self.log_warn(u"Using the language code as the voice code")
                voice_code = language
        else:
            self.log(u"TTS voice override in rconf")
        self.log([u"Language to voice code: '%s' => '%s'", language, voice_code])
        return voice_code