gpg-ping

#!/usr/bin/env python
import argparse, os, subprocess

p = argparse.ArgumentParser()
p.add_argument("-e", dest="encrypt_key", required=True)
p.add_argument("-s", dest="sign_key")
args = p.parse_args()

cmd = ["gpg", "-q",
       "-e", "-r", args.encrypt_key]
if args.sign_key:
    cmd.extend(["-s", "-u", args.sign_key])
with open(os.devnull, "r+b") as fdevnull:
    s = subprocess.check_output(cmd, stdin=fdevnull)
    subprocess.check_output(["gpg", "-d"],
                            input=s,
                            stderr=fdevnull) # can't silence it using -q