def cannot_convert(self, node, reason=None):
        """Warn the user that a given chunk of code is not valid Python 3,
        but that it cannot be converted automatically.

        First argument is the top-level node for the code in question.
        Optional second argument is why it can't be converted.
        """
        lineno = node.get_lineno()
        for_output = node.clone()
        for_output.prefix = u""
        msg = "Line %d: could not convert: %s"
        self.log_message(msg % (lineno, for_output))
        if reason:
            self.log_message(reason)
dataset/ETHPy150Open kleientertainment/ds_mod_tools/pkg/win32/Python27/Lib/lib2to3/fixer_base.py/BaseFix.cannot_convert/original