How to walk up parent directories?

[David Smith]

Matthew Wilson wrote:
> Is there already a tool in the standard library to let me walk up from a
> subdirectory to the top of my file system?
> 
> In other words, I'm looking for something like:
> 
>     >>> for x in walkup('/home/matt/projects'):
>     ...     print(x)
>     /home/matt/projects
>     /home/matt
>     /home
>     /
> 
> I know I could build something like this with various os.path
> components, but I'm hoping I don't have to.
> 
> TIA
> 
> 
> Matt

You should take a look at the os.path module.  Seems like you might find
something in that toolbox for this.

--David