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absolute path to a file

Thank you Manfred and Cameron!
I think the problem may lie within syntax rather than vocabulary. The 
code works in one place but not where I use it in my script*. Cameron?s 
suggestion works when I try

|?print('test1:', os.path.realpath(bpy.data.filepath))|

This returns:

BUT does not work with

This returns only

Here is my full script:
# starts

|import bpy||
||import os||
||from pathlib import Path ||
||texture_list = []||
||with open(os.path.splitext(bpy.data.filepath)[0] + ".txt", "w") as 
||?for obj in bpy.context.scene.objects:||
||??? for s in obj.material_slots:||
||??????? if s.material and s.material.use_nodes:||
||??????????? for n in s.material.node_tree.nodes:||
||??????????????? if n.type == 'TEX_IMAGE':||
||??????????????????? texture_list += [n.image]||
||print(obj.name,'uses',n.image.name,'saved at',n.image.filepath, 'which 
is at', os.path.realpath(n.image.filepath), file=outstream)||
|# ends

Chris, I only mention the extra leading slash on my Mac in case anyone 
wonders why it is there. Python puts it there to escape the following slash.
Perhaps I should also mention (in case it is relevant) that I am calling 
my script ?texturescript.py? from the Python console of Blender. I use:

|filename = "/Users/Lion/Desktop/test8/texturescript.py"||
||exec(compile(open(filename).read(), filename, 'exec'))|

* My original |os.path.abspath| also works (and doesn?t work) in these 
circumstances. As does Manfred?s: |Path('./myfile').resolve()|.

On 16/08/2019 05:44, Manfred Lotz wrote:
> On Fri, 16 Aug 2019 09:00:38 +1000
> Cameron Simpson <cs at cskk.id.au> wrote:
>> On 15Aug2019 22:52, Manfred Lotz <ml_news at posteo.de> wrote:
>>> I did this:
>> >from pathlib import Path
>>> abs_myfile = Path('./myfile').resolve()
>>> which worked fine for me.
>> There is also os.path.realpath(filename) for this purpose. In modern
>> Python that also accepts a Pathlike object.
> Thanks for this.
> I changed my code to use your suggestion which seems to
> be better for the situation where I used resolve() before.
Paul St George

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