def _OPTION(self):
        opt_buf = []
        while self.c != EOF and self.c == '-':
            opt_buf.append(self.c)
            self.consume()
        if self.c not in EOF:
            SyntaxError("expected option name, got nothing")
        opt_buf.append(self._NAME())
        return ''.join(opt_buf)
dataset/ETHPy150Open guillermooo/Mercurial/shglib/parsing.py/CommandLexer._OPTION/operator `==` -> `not in`