gh-135511 Fixed NameError and AttributeError lack of the message in IDLE

[Locked-chess-official]

#135511

• Issue: NameError has different actions when be raised in IDLE #135511

[python-cla-bot]

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[Locked-chess-official]

I use blurb to create a .rst file then click add file and choose it to IDLE, but it was wrong. So how should I do?

[terryjreedy]

To add a test, I think if might be sufficient to add the following tuple to the end of data in test_idle.test_run.ExceptionTest.

            ('raise NameError("123\n456")', NameError, "123\n456\n"),

If you want me to make changes and test, I will, but I need sleep now.

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A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

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[terryjreedy]

The hint process is rather fragile. Modifying get_message_lines so that sys.excepthook does not print any traceback, which require setting err.traceback to None before the call in addition to not passing a traceback, can alter the hint. In particular, for abc, "Did you mean: 'abs'?" is omitted and only "Did you forget to import 'abc'?" is added. Not only do the message changes break multiple tests, but this particular result is worse for the user. I am accepting the alternative of directly printing multiline user name error messages instead of calling a modified get_message_lines. I will look at adding a new test_xxx function to test the case fixed here.

[Locked-chess-official]

I have made the requested changes; please review again

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Thanks for making the requested changes!

@terryjreedy: please review the changes made to this pull request.

[Locked-chess-official]

@terryjreedy

[Locked-chess-official]

To add the test, I have to add a new default for print_exception(), now is print_exception(in_test=False). When in test, nothing will be print to sys.stderr. It is for test_run.py. In test_run.py, it needs to change the test to exec mode and use another way to test.

[Locked-chess-official]

I make the change clearer now.

[github-actions]

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

[read-the-docs-community]

Documentation build overview

📚 cpython-previews | 🛠️ Build #33233256 | 📁 Comparing 97e414f against main (1b9fe5c)

  🔍 Preview build  

480 files changed · ± 451 modified · - 29 deleted

± Modified

• about.html
• bugs.html
• glossary.html
• index.html
• license.html
• py-modindex.html
• c-api/allocation.html
• c-api/apiabiversion.html
• c-api/arg.html
• c-api/buffer.html
• and 441 more...

- Deleted

• improve-page-nojs.html
• improve-page.html
• _static/tachyon-example-flamegraph.html
• _static/tachyon-example-heatmap.html
• c-api/curses.html
• c-api/interp-lifecycle.html
• c-api/picklebuffer.html
• c-api/profiling.html
• c-api/sentinel.html
• c-api/slots.html
• and 19 more...

[Locked-chess-official]

@serhiy-storchaka
@terryjreedy
@picnixz
I found that traceback.TracebackException.format_exception_only can fix this problem.