code: def __get_translation(self, surah, ayah, lang):
          
          # Construct url to fetch translation data.
          url = '{base}/translations/{lang}/{lang}_translation_{surah}.json'.format(
              base=self.BASE_API, lang=lang, surah=int(surah)
          )
          try:
              response = urlopen(url)                             # Fetch data from give url.
              data = json.loads(response.read().decode('utf-8'))  # Get response and convert to dict.
              translation = data['verse'][ayah]
          except ODOAException:
              return None
          else:
              return translation
docs: Perform http request to get translation from given surah, ayah and
          language.
  
          Parameter:
              :surah      --  Surah index from API pages.
              :ayat       --  Ayat key.
              :lang       --  Language code.
  
          Return:
              :string     --  Translation from given surah and ayat.