os.walk restart

[Tim Chase]

Steve Howell wrote:
> If that's the case, then you might be able to get away with just
> leaving some kind of breadcrumbs whenever you've successfully
> processed a directory or a file,

Unless you're indexing a read-only device (whether hardware 
read-only like a CD, or permission-wise read-only like a network 
share or a non-priv user walking system directories)...

> Also, I can understand why the operations on the files themselves
> might crash, but can't you catch an exception and keep on chugging?

I also wondered this one, perhaps logging the directory in which 
the exception happened to later revisit. :)

-tkc