def list_pkgs(*packages):
    pkgs = {}
    cmd = 'dpkg -l {0}'.format(' '.join(packages))
    out = __salt__['cmd.run_all'](cmd, python_shell=False)
    if out['retcode'] != 0:
        msg = 'Error:  ' + out['stderr']
        log.error(msg)
        return msg
    out = out['stdout']

    for line in out.splitlines():
        if line.startswith('ii '):
            comps = line.split()
            pkgs[comps[1]] = comps[2]
    return pkgs
List the packages currently installed in a dict::
dataset/ETHPy150Open saltstack/salt/salt/modules/dpkg.py/list_pkgs