[Python-Dev] Pathlib enhancments - method name only (original) (raw)

Eric Snow ericsnowcurrently at gmail.com
Fri Apr 8 22:45:32 EDT 2016

On Fri, Apr 8, 2016 at 7:41 PM, Brett Cannon <brett at python.org> wrote:

On Fri, Apr 8, 2016, 16:13 Glenn Linderman <v+python at g.nevcal.com> wrote:

On 4/8/2016 3:28 PM, Eric Snow wrote: All this matters because it impacts the value returned from ospath(). Should it return the string representation of the path for the current OS or some standardized representation? I'd expect the former. However, if that is the expectation then something like pathlib.PureWindowsPath will give you the wrong thing if your current OS is linux. pathlib.PureWindowsPath.ospath() would have to fail or first internally convert to pathlib.PurePosixPath? Now that Windows 10++ will run Ubuntu apps, will Python be able to tell the difference for when it should return Windows-format paths and Posix-format paths? All the bits of code in Python accept / as a separator on Windows so it doesn't matter (but Ubuntu on Windows is Linux, so it will be / just like any other Linux install).

Technically it isn't linux. :) It's the Ubuntu user-space using the linux syscalls (like normal), and those syscalls are implemented as light wrappers around the Windows kernel. They even implemented fork. On Windows. There's no linux kernel involved.

(I'm sure the answer is yes, the Python-for-Ubuntu running on Windows would do the latter, and the Python-for-Windows would do the former. Although, it is not clear what sys.platform will return, yet...) It should return Linux.

From screenshots it looks like lsbrelease -a returns the normal Ubuntu info [1] and uname -a says linux (don't know if that will change). [2] So yeah, sys.platform should return Linux.

-eric

[1] https://blogs.windows.com/buildingapps/2016/03/30/run-bash-on-ubuntu-on-windows/ [2] https://insights.ubuntu.com/2016/03/30/ubuntu-on-windows-the-ubuntu-userspace-for-windows-developers/

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