On 2020-05-28 22:34, Terry Reedy wrote:
On 5/28/2020 9:19 AM, Eryk Sun wrote:
On 5/26/20, BlindAnagram <blindanag...@nowhere.com> wrote:
But if I try to make the directory myself (as I tried first):
join(base, '..\\..\\', 'build', '\\')
I obtain:
'C:\\'
The documentation says that an absolute path in the parameter list for
join will discard all previous parameters but '\\' is not an absoute path!
First, to be clear, a rooted path in Windows is not absolute (*), but
that's not relevant here. What happens is that joining a path is like
issuing successive "cd" commands in the shell, and "cd \" takes you to
the root path of the current drive. The implementation of
ntpath.join() similarly tracks the current drive via
ntpath.splitdrive() while joining components.
Ah. cd only changes the cwd within a device. Changing the active device
is done otherwise. In Command Prompt
C:\Users\Terry>f: # : required
F:\>c:
C:\Users\Terry>cd f:
F:\
C:\Users\Terry>cd f:/dev
C:\Users\Terry>f:
f:\dev>
cd has a switch /d that will also change the drive:
C:\Users\Terry>cd /d f:/dev
f:\dev>
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