views.py 文件源码

def group_scopes(scopes):
    """Group scopes by version and type
    :type scopes: list[Prefix]
    """
    def _prefix_as_int(prefix):
        return IP(prefix.net_address).int()

    groups = defaultdict(list)
    for scope in scopes:
        prefix = IP(scope.net_address)
        if prefix.iptype() == 'PRIVATE':
            groups['private'].append(scope)
        elif prefix.version() == 4:
            groups['ipv4'].append(scope)
        elif prefix.version() == 6:
            groups['ipv6'].append(scope)

    if any([groups['private'], groups['ipv4'], groups['ipv6']]):
        return IpGroup(*[sorted(groups[x], key=_prefix_as_int)
                         for x in ('private', 'ipv4', 'ipv6')])
    else:
        return []