os.path.join("/a","/b")

[Siggy Brentrup]

matt at mondoinfo.com (Matthew Dixon Cowles) writes:

> I was a little surprised today to notice that
> 
> os.path.join("/a","/b") returns '/b'
> 
> (os.path is posixpath in this case of course) while
> 
> os.path.join("/a/","b") returns "/a/b"
> 
> which I expected from both. Poking back into my dusty archives, I find
> that it has been that way since at least 1.4 so I presume that it's a
> feature but I'll be darned if I can figure out the logic. It sure
> doesn't seem to have much to do with joining. The module's docstring
> just says "Join two or more pathname components, inserting '/' as
> needed".

> If someone could explain the logic to me, I'd be grateful.

Consult the library reference, it says "if any component is an
absolute path ..."

Thx
  Siggy