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Ok, CLA is signed now and I'm ready for feedback.

Best regards
Robert

I wanted to ask for some progress on this issue. Is there somebody willing to review it? It still merges without conflicts.

Best regards
Robert

Adding a new parameter is an enhancement that has not been mentioned on the issue, let alone approved.

Sorry, but what did you mean by "let alone approved"?

Just for reference, here is a quote of the docs for the new parameter of argparse.ArgumentParser() I suggest:

• fromfile_parent_relative - Whether to treat paths of argument
  files as relative to the location of the file they are specified in
  (True) or to the current working directory (False) (default:
  False)

Best regards
Robert

My comment (which constituted my review) was in response to that. You propose to add a new feature with a specific name. AFAIK, neither Bethard nor any other core developer has approved of either the new feature as a concept or the specific name.

To seek such approval, you could post to python-ideas list. (I think most proposals other than for tkinter and IDLE should start there.) Briefly describe the idea and rationale and reference the issue and this PR. If you get a positive response, expect discussion of the option (parameter) name.

Thank you for your explanation. This is my first contribution to cpython, hence thinks went a bit wrong somehow.

@terryjreedy Ah! I didn't get your response at python-dev. That's why your comment here seemed out-of-context to me. Now I read it and things are clear. Thanks again!

This PR is stale because it has been open for 30 days with no activity.

Got issue testing so did a full test then got:
422 tests OK.

2 tests failed:
test_embed test_ossaudiodev

9 tests skipped:
test_devpoll test_ioctl test_kqueue test_msilib test_startfile
test_winconsoleio test_winreg test_winsound test_zipfile64

Total duration: 7 min 26 sec
Tests result: FAILURE

cpython on  main [$] via 🐍 v3.11.0a6+ took 7m27s
✦ ❯ gh pr checkout 1698
Switched to branch 'BPO-30421-argparse_fromfile_parent_relative'

cpython on  BPO-30421-argparse_fromfile_parent_relative [$?] via 🐍 v3.11.0a6+ took 2s
✦ ❯ ./python -m test -vvv test_argparse
Error processing line 1 of /home/me/.local/lib/python3.11/site-packages/sphinxcontrib_applehelp-1.0.2-py3.8-nspkg.pth:

Fatal Python error: init_import_site: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):
File "", line 186, in addpackage
File "", line 1, in
File "/home/me/Documents/cpython/Lib/importlib/init.py", line 51, in
_w_long = _bootstrap_external._w_long
^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'importlib._bootstrap_external' has no attribute '_w_long'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "", line 1178, in _find_and_load
File "", line 1149, in _find_and_load_unlocked
File "", line 690, in _load_unlocked
File "", line 982, in exec_module
File "", line 616, in
File "", line 602, in main
File "", line 343, in addusersitepackages
File "", line 226, in addsitedir
File "", line 196, in addpackage
File "/home/me/Documents/cpython/Lib/traceback.py", line 5, in
import linecache
^^^^^^^^^^^^^^^^
File "/home/me/Documents/cpython/Lib/linecache.py", line 11, in
import tokenize
^^^^^^^^^^^^^^^
File "/home/me/Documents/cpython/Lib/tokenize.py", line 33, in
import re
^^^^^^^^^
File "/home/me/Documents/cpython/Lib/re.py", line 123, in
import sre_compile
^^^^^^^^^^^^^^^^^^
File "/home/me/Documents/cpython/Lib/sre_compile.py", line 17, in
assert _sre.MAGIC == MAGIC, "SRE module mismatch"
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: SRE module mismatch

This PR is stale because it has been open for 30 days with no activity.