gistfile1.py

#! /usr/bin/env python3
import string

p = ''
k = ''
c = ''

def cifrar(p,k):
  if(p == ' '):
    return ' '
  else:
    cif = (((ord(p)-97)+(ord(k)-97))%26)
    return string.ascii_lowercase[cif]

def decifrar(c,k):
  if(c == ' '):
    return ' '
  else:
    decif = (((ord(c)-97)-(ord(k)-97)+26)%26)
    return string.ascii_lowercase[decif]

for i in range(len(p)):
  print(p[i]+' -> '+k[i]+' = '+cifrar(p[i],k[i]))

print('\n\n\n')

for i in range(len(p)):
  print(cifrar(p[i],k[i]),end='')

#for i in range(len(p)):
#  print(c[i]+' -> '+k[i]+' = '+decifrar(c[i],k[i]))