base.py 文件源码

def _parse_rfc1738_args(url):
    pattern = re.compile(r'''
        (?P<name>[\w\+]+)://
        (?:
            (?P<username>[^:/]*)
            (?::(?P<password>.*))?
        @)?
        (?:
            (?:
                \[(?P<ipv6host>[^/]+)\] |
                (?P<ipv4host>[^/:]+)
            )?
            (?::(?P<port>[^/]*))?
        )?
        (?:/(?P<database>.*))?
        ''', re.X)
    m = pattern.match(url)
    if m is not None:
        components = m.groupdict()
        ipv6 = components.pop('ipv6host')
        ipv4 = components.pop('ipv4host')
        components['host'] = ipv4 or ipv6
        return components
    else:
        raise ValueError('wrong url format')