①关于“帮扶家庭不够困难”的误解
, sessProc :: ProcessHandle
，更多细节参见91视频
sys.stdout.write(u"\u001b[1000D") # Move all the way left again
But mapv is a higher-order function. It receives alength as a generic IFn object and calls invoke() on it for every item. This means that:
return opt.ArgIntVar(&verbosity)