code: def supported_versions(django, cms):
      
      cms_version = None
      django_version = None
  
      try:
          cms_version = Decimal(cms)
      except (ValueError, InvalidOperation):
          try:
              cms_version = CMS_VERSION_MATRIX[str(cms)]
          except KeyError:
              pass
  
      try:
          django_version = Decimal(django)
      except (ValueError, InvalidOperation):
          try:
              django_version = DJANGO_VERSION_MATRIX[str(django)]
          except KeyError:  # pragma: no cover
              pass
  
      try:
          if (
                  cms_version and django_version and
                  not (LooseVersion(VERSION_MATRIX[compat.unicode(cms_version)][0]) <=
                       LooseVersion(compat.unicode(django_version)) <=
                       LooseVersion(VERSION_MATRIX[compat.unicode(cms_version)][1]))
          ):
              raise RuntimeError(
                  'Django and django CMS versions doesn\'t match: '
                  'Django {0} is not supported by django CMS {1}'.format(django_version, cms_version)
              )
      except KeyError:
          raise RuntimeError(
              'Django and django CMS versions doesn\'t match: '
              'Django {0} is not supported by django CMS {1}'.format(django_version, cms_version)
          )
      return (
          compat.unicode(django_version) if django_version else django_version,
          compat.unicode(cms_version) if cms_version else cms_version
      )
docs: Convert numeric and literal version information to numeric format