def get_message(self):
cond = self.condition_name<EOL>if cond in STREAM_ERRORS:<EOL><INDENT>return STREAM_ERRORS[cond][<NUM_LIT:0>]<EOL><DEDENT>else:<EOL><INDENT>return None<EOL><DEDENT>
Get the standard English message for the error.

        :return: the error message.
        :returntype: `unicode`