python 换位密码算法的实例详解

def encrypt(plainText,t): 
 result =[] 
 length = len(t) 
 temp =[plainText[i:i+length]for i in range(0,len(plainText),length)] 
for item in temp[:-1]: 
 newItem='' 
for i in t: 
 newItem = newItem + item[i-1] 
 result.append(newItem) 
return''.join(result)+ temp[-1] 
p ="Error should never pass silently" 
c = encrypt(p,(1,4,3,2)) 
print(c) 
print(encrypt(c,(1,4,3,2))) 
 

Eorrrhs odlu venep ra ssselintly
Error should never pass silently