gistfile1.py

#!/usr/bin/env python
import json
import os
import sys

import salt.config
import salt.runner

if __name__ == '__main__':
    __opts__ = salt.config.master_config(
            os.environ.get('SALT_MASTER_CONFIG', '/etc/salt/minion'))
    runner = salt.runner.Runner(__opts__)  
   
    stdout_bak = sys.stdout
    with open(os.devnull, 'wb') as f:
        sys.stdout = f  
        ret = runner.cmd('cache.grains', [os.environ.get('SALT_MINION')]
    sys.stdout = stdout_bak

    print json.dumps(ret)