def JoinLists(**args):
  out = {}
  for key, val in args.items():
    if val:
      out[key] = StrJoin(JOIN_DELIMS[key], val)
    else:
      out[key] = ''
  return out
Check if a file exists and is a block device.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/_internal/graphy/backends/google_chart_api/util.py/JoinLists--crossover with--dataset/ETHPy150Open saltstack/salt/salt/modules/file.py/is_blkdev