python对ip段处理

#生成下一次循环的边界条件
def get_side(pos,now):
    global begin,end
    global first,last

    #   find_side                   #
    #---------in---------------
    #begin 110.67.1.95 end 111.67.1.95
    #first 110.x.x.x   last 111.x.x.x
    #pos 110 now 0
    #---------out--------------
    #first 110.67.x.x  last 111.255.x.x
    #                               #
    find_side = lambda begin, end, pos, fisrt, last, now:\
                ( pos == first[now] and begin[now + 1] or 1, pos == last[now] and end[now + 1] or 255)

    first[now + 1],last[now + 1] = find_side(begin,end,pos,first,last,now)
    return range(first[now + 1],last[now + 1] + 1)


def gen_ip(ip):
    '''
    in in 110.67.1.30-110.67.1.32
    out '{"110.67.1.30", "110.67.1.31", "110.67.1.33"}'
    '''
    #ip段范围
    global begin, end
    #临时列表，存储边界条件
    global first, last
    sides = ip.split('-')
    begin = map(lambda x:int(x),sides[0].split('.'))
    end   = map(lambda x:int(x),sides[1].split('.'))

    first[0] = begin[0]
    last[0] = end[0]
    ip_str = "'{%s}'"
    tmp = ""

    for pos_one in range(begin[0],end[0] + 1):
        for pos_two in get_side(pos_one,0):
            for pos_three in get_side(pos_two,1):
                for pos_four in get_side(pos_three,2):
                    str = '"%d.%d.%d.%d",' % (pos_one, pos_two, pos_three, pos_four)
                    tmp += str

    return ip_str % tmp.rstrip(',')