[issue36112] os.path.realpath on windows and substed drives

[Eryk Sun]

Eryk Sun  added the comment:

In Windows, realpath is currently an alias for abspath. Issue 14094 has a 
pending PR that implements realpath, but it's waiting on improved tests and 
final approval. I'm afraid it won't make it into 3.8.

I suggest using the resolve() method of a pathlib.Path. For example:

>>> os.system('subst W: C:\\Windows')
0
>>> pathlib.Path('W:\\').resolve()
WindowsPath('C:/Windows')

--
nosy: +eryksun
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> ntpath.realpath() should use GetFinalPathNameByHandle()

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[issue36112] os.path.realpath on windows and substed drives

[Totte Karlsson]

New submission from Totte Karlsson :

Python's os.path.realpath, when used with a substed drive on the Windows 
platform, don't resolve the substed path to the *real* path. 

For example creating a substed drive like this:

subst z: C:\Users\Public\Desktop

and checking for the real path in python like this:

import os
myPath = "S:\\"
print("Real path of: " + myPath + " is: " + os.path.realpath(myPath) )

prints

Real path of: S:\ is: S:\

In the docs for the [subst][1] command, a substed drive is referred to as a 
*virtual* drive. Virtual, suggesting something being "not real", indicates that 
the Python *realpath* command is not working properly on Windows. 


  [1]: 
https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/subst

--
components: Windows
messages: 336574
nosy: Totte Karlsson, paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
status: open
title: os.path.realpath on windows and substed drives
type: behavior
versions: Python 3.7

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