Generate a key for use with salt-ssh

def gen_key(path):
    '''
    Generate a key for use with salt-ssh
    '''
    cmd = 'ssh-keygen -P "" -f {0} -t rsa -q'.format(path)
    if not os.path.isdir(os.path.dirname(path)):
        os.makedirs(os.path.dirname(path))
    subprocess.call(cmd, shell=True)