RC4 Encryption in Python -

i've had through several python scripts using rc4 block cipher... i'm having issues completing program outputs properly...

program asks "key" , "plaintext" (text encrypt key). , outputs encoded string... think. if enter word "plaintext" encrypt following. think incomplete...

[187, 243, 22, 232, 217, 64, 175, 10, 211] 

i want have encrypted output in hex

bb f3 16 e8 d9 40 af 0a d3 

my program incomplete @ moment, direction on how to

1. finish off encryption part outputs hexadecimal (i think have convert bytes hex?)

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edit: above has been resolved ebrahim. need decryption

2. i'm lost on begin decryption... want able have input take key , ciphertext both in hexadecimal; , decrypt ciphertext plaintext.

i understand logic in encryption process, i'm having trouble grasping decryption process though quite similar.

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# global variables state = [none] * 256 p = q = none  def setkey(key):     ##rc4 key scheduling algorithm     global p, q, state     state = [n n in range(256)]     p = q = j = 0     in range(256):         if len(key) > 0:             j = (j + state[i] + key[i % len(key)]) % 256         else:         j = (j + state[i]) % 256     state[i], state[j] = state[j], state[i]  def bytegenerator():     ##rc4 pseudo-random generation algorithm     global p, q, state     p = (p + 1) % 256     q = (q + state[p]) % 256     state[p], state[q] = state[q], state[p]     return state[(state[p] + state[q]) % 256]  def encrypt(key,inputstring):     ##encrypt input string returning byte list     setkey(string_to_list(key))     return [ord(p) ^ bytegenerator() p in inputstring]  def decrypt(inputbytelist):     ##decrypt input byte list returning string     return "".join([chr(c ^ bytegenerator()) c in inputbytelist])    def inttolist(inputnumber):     ##convert number byte list     inputstring = "{:02x}".format(inputnumber)     return [int(inputstring[i:i + 2], 16) in range(0,    len(inputstring), 2)]  def string_to_list(inputstring):     ##convert string byte list     return [ord(c) c in inputstring]     loop = 1 while loop == 1: #simple loop bring user menu      print("rc4 encryptor/decryptor")     print     print("please choose option below menu")     print     print("1) encrypt")     print("2) decrypt")     print      choice = input("choose option: ")     choice = int(choice)      if choice == 1:         key = raw_input("enter key: ")         inputstring = raw_input("enter plaintext: ")         encrypt(key, inputstring)       elif choice == 2:            key = raw_input("enter key: ")         ciphertext = raw_input("enter plaintext: ")         print decrypt(inttolist(ciphertext))      elif choice == 3:      #returns user previous menu ending loop , clearing screen.         loop = 0      else:            print ("please enter valid option") #if number other 1, 2 or 3 entered. 

to convert decimal output hex output:

>>> arr = [187, 243, 22, 232, 217, 64, 175, 10, 211] >>> ' '.join('%02x'%i in arr) 'bb f3 16 e8 d9 40 af 0a d3' >>>