Rearranging elements in Python

[Nirmal]

i have a script and i think we can achieve the objective but i am missing somewhere ?

with open("abc1.txt", "w+") as fw1, open("abc2.txt", "w+") as fw2:
    for i in p:
        if len(i.partition("/")[0]) == 4:
            fw1.write('int ' + i + '\n  mode\n')
        else:
            i = 0
            while i < len(p):
                start = p[i].split('/')
                print start
                if (start[0] == 'Eth1'):
                    i += 3
                else:
                    key = start[0]
                    #print key
                    i += 1
                    while i < len(p) and p[i].split('/')[0] == key:
                        i += 1
                end = p[i-1].split('/')
                fw2.write('confi ' + start[0] + '/' + start[1] + '-' + end[1] + '\n mode\n')