Something

import sysimport osword=[]word1=[]alphabet= {1:'a', 2:'b' , 3:'c' , 4:'d' , 5:'e' , 6:'f' , 7:'g' , 8:'h' , 9:'i' , 10:'j' , 11:'k' , 12:'l' , 13:'m' , 14:'n' , 15:'o' , 16:'p' , 17:'q' , 18:'r' , 19:'s' , 20:'t' , 21:'u' , 22:'v' , 23:'w' , 24:'x' , 25:'y' , 26:'z'}numbers= {'a':1 , 'b':2 , 'c':3 , 'd':4 , 'e':5 , 'f':6 , 'g':7 , 'h':8 , 'i':9 , 'j':10 , 'k':11 , 'l':12 , 'm':13 , 'n':14 , 'o':15 , 'p':16 , 'q':17 , 'r':18 , 's':19 , 't':20 , 'u':21 , 'v':22 , 'w':23 , 'x':24 , 'y':25 , 'z':26}a=""def sclear():	sys.stdout.write(os.popen('clear').read())def encrypt(alphabet,numbers):	string1=raw_input('Enter your string:      ')	length=len(string1)	for num in range(length):	  newstring=3+numbers[string1[num]]          word.append(alphabet[newstring])	  encrypted="".join(word)	print "The encrypted text is:		%s" % encrypteddef decrypt(alphabet,numbers):	string1=raw_input('Enter your string:	   ')	key=raw_input('Enter the key:	   ')	length=len(string1)	for num in range(length):	  b="%s-%s" %  (numbers[string1[num]],key)	  a=numbers[string1[num]]	  print a	  print alphabet[a]	  print b	  word1.append(alphabet[newstring])	  decrypted="".join(word1)	print "The decrypted text is:		%s" % decrypteddef arg1():  action=raw_input('Do you want to encrypt or decrypt(e,d):')  if action == "e":    encrypt(alphabet,numbers)  elif action == "d":    decrypt(alphabet,numbers)  elif action != "e"|"d":    arg1()sclear()arg1()print "Done";