def decode(ww,key_open): rev="" for w1 in ww: sx=dic.index(w1) sx=sx+key_open if sx>25:sx=sx-25 if sx<0:sx=sx+25 rev=rev+dic[sx] return rev def code(ww,key): rev="" for w1 in ww: sx=dic.index(w1) sx=sx+key if sx>25:sx=sx-25 if sx<0:sx=sx+25 rev=rev+dic[sx] return rev dx="abcdefghijklmnopqrstuvwxyz" dic=[] for d1 in dx: dic.append(d1) w="phi" key=2 key_open=-key ch=code(w,key) rev=decode(ch,key_open) print(rev)
