algo.py 文件源码

def _expand(self, cs):
        if cs in self._SIMPLE:
            return self._SIMPLE[cs]
        if cs in self._ACCENTS:
            arg = self._scan_argument()
            if len(arg) == 0:
                seq, rest = ' ' + self._ACCENTS[cs], ''
            elif arg.startswith('\\i') or arg.startswith('\\j'):
                # Unicode combining marks should be applied to the
                # regular i, not the dotless i.
                seq, rest = arg[1] + self._ACCENTS[cs], arg[2:]
            else:
                seq, rest = arg[0] + self._ACCENTS[cs], arg[1:]
            return unicodedata.normalize('NFC', seq) + rest
        return None