_regex_core.py 文件源码

def parse_repl_named_char(source):
    "Parses a named character in a replacement string."
    saved_pos = source.pos
    if source.match("{"):
        name = source.get_while(ALPHA | set(" "))

        if source.match("}"):
            try:
                value = unicodedata.lookup(name)
                return ord(value)
            except KeyError:
                raise error("undefined character name", source.string,
                  source.pos)

    source.pos = saved_pos
    return None