code: def deobfuscate(cls, data):
          
          # the str() call is necessary to convert the unicode string
          # to an ascii string since the urlsafe_b64decode method
          # sometimes chokes on unicode strings
          return base64.urlsafe_b64decode(str((
              data + b'A=='[(len(data) - 1) % 4:])))
docs: Reverses the obfuscation done by the :meth:`obfuscate` method.
          If an identifier arrives without correct base64 padding this
          function will append it to the end.