code: def get_by_code(self, code):
          
          if any(x in code for x in ('_', '-')):
              cc = CultureCode.objects.get(code=code.replace('_', '-'))
              return cc.language
  
          elif len(code) == 2:
              return self.get(iso_639_1=code)
  
          elif len(code) == 3:
              return self.get(Q(iso_639_2T=code) |
                              Q(iso_639_2B=code) |
                              Q(iso_639_3=code))
  
          raise ValueError(
              'Code must be either 2, or 3 characters: "%s" is %s' % (code, len(code)))
docs: Retrieve a language by a code.
  
          :param code: iso code (any of the three) or its culture code
          :return: a Language object