Encrypt+Sign then decrypt using gpg

gnupg.py

import gnupg
import cStringIO

gpg = gnupg.GPG()
gpg.encoding = 'utf-8'

me = {'name_real': 'alice',
      'name_email': 'alice@example.com',
      'expire_date': '2024-04-01',
      'passphrase': 'alicespassword'}

input_data = gpg.gen_key_input(**me)

key = gpg.gen_key(input_data)
alice_fp = key.fingerprint

with open('alice_private.asc', 'w') as f:
    f.write(gpg.export_keys(str(key), True))

bob = {'name_real': 'Bob',
       'name_email': 'bob@example.com',
       'expire_date': '2024-04-01',
       'passphrase': 'bobspassword'}

input_data = gpg.gen_key_input(**bob)

key = gpg.gen_key(input_data)
bob_fp = key.fingerprint

out = cStringIO.StringIO()
out.write('The quick brown fox jumps over the lazy dog')

e = gpg.encrypt(
    out.getvalue(),
    bob_fp,
    symmetric=False,
    default_key=alice_fp,
    passphrase='alicespassword',
    armor=False)

print e.status, e.stderr

d = gpg.decrypt(e.data, passphrase='bobspassword')
print d.status, d.stderr, d.data