cesar cipher with circular queue

cesar_cipher.py

import string

class ColaCircular:
	
	def __init__(self):
		self.datalist = []

	def push(self, data):
		self.datalist.append(data)

	def pop(self):
		aux = self.datalist[0]
		self.datalist.pop(0)
		self.datalist.append(aux)
		return aux


cc = ColaCircular()

class Cesar:
	
	def __init__(self):
		cc = ColaCircular()
		for i in string.lowercase:
			cc.push(i)
		self.abcdario = cc

	def reset_cc(self):
                cc = ColaCircular()
                for i in string.lowercase:
                        cc.push(i)
                self.abcdario = cc

	def cipher(self, msg, key):
		result = ""
		for i in msg:
			for j in range(0, string.lowercase.index(i) + key +1):
				c = self.abcdario.pop()
			self.reset_cc()
			result += c
		return result


	def decipher(self, msg, key):
		result = ""
		for i in msg:
			for j in range(0, len(string.lowercase) + string.lowercase.index(i) - key +1):
				c = self.abcdario.pop()
			self.reset_cc()
			result += c
		return result

cesar = Cesar()
msg = raw_input("Ingrese mensaje a cifrar con Cesar: ")
key = input("Ingrese clave numerica para cifrado Cesar: ")
cipher_msg = cesar.cipher(msg,key)
print("Mensaje cifrado con Cesar: " + str(cipher_msg))
decipher_msg= cesar.decipher(cipher_msg,key)
print("Mensaje descifrado con Cesar: " + str(decipher_msg))

Muyyyy bueno!