To do the traversal of the source directory structure you use the walk method in the Python OS module.

要遍历源目录结构，需要使用Python模块os中的walk方法。

youdao

Once you can successfully run for long stretches, don't feel as if you have to abandon the run/walk method.

当你可以成功地跑很长一段的时候，不要觉得可以你可以丢掉跑步/步行方法。

youdao

The run/walk method is simple: After you've warmed-upwith a 5-minute walk, run for a short segment and then take a walkbreak.

跑步/步行方法是简单的：在你已经用5分钟步行热身后，跑很短的一部分，然后休息一下。

youdao

The charity also wants a greater proportion of funding put towards community transport because many people were unable to manage the walk to their nearest method of public transport.

BBC: Bus stop

On top of that, criminals could use the same method to fool the terminal into thinking a transaction was bank-approved, allowing them to walk out of a store with goods they hadn't paid for.

ENGADGET: Security experts hack payment terminals to steal credit card info, play games