def _derive_checksum(self, s):
        """ Derive the checksum

            :param str s: Random string for which to derive the checksum
        """
        checksum = hashlib.sha256(bytes(s, "ascii")).hexdigest()
        return checksum[:4]
def _derive_checksum(self, s):
        """ Derive the checksum

            :param str s: Random string for which to derive the checksum
        """
        checksum = hashlib.sha256(bytes(s, "ascii")).hexdigest()
        return checksum[:4]
def _derive_checksum ( self , s ) : checksum = hashlib . sha256 ( bytes ( s , "ascii" ) ) . hexdigest ( ) return checksum [ : 4 ]
Derive the checksum

            :param str s: Random string for which to derive the checksum
Derive the checksum