Enigma | Base64 Tool

#!/use/bin/env Python
#Coded by Derick Santos
#Salve Pedrão haha

import base64
import sys
import os

os.system("clear")

def encode():
    msg = raw_input("\nMensagem -> ")
    crypt = base64.b64encode(msg)
    print(crypt)

def decode():
    code_msg = raw_input("\nMensagem -> ")
    decrypt = base64.b64decode(code_msg)
    print(decrypt)

def help():

    var = '''     Enigma | Encrypt/Decrypt Base6
                    by Derick Santos

   ./enigma.py --encode | Encripta mensagem
   ./enigma.py --decode | Decripta mensagem'''

    print(var)
help()

try:

    arg = sys.argv[1]

    if arg == " ":
       help()

    if arg == "--encode":
       encode()
       exit()
    if arg == "--decode":
       decode()
       exit()
    if arg == "--help":
       help()
       exit()
except IndexError:
    print(" ")