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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Improved error reporting for doctests run with unittest","articleBody":"There are several issues with error reports when doctests are wrapped in `DocTestCase`.\n\n* When error happens during compilation or execution an example, the traceback contains several lines from `doctest.py`:\n\n          File ...\n            exec(compile(example.source, filename, \"single\",\n            ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n                         compileflags, True), test.globs)\n                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n* When the output differs, the traceback of AssertionError contains other line from `doctest.py`:\n\n        Traceback (most recent call last):\n          File ...\n            raise self.failureException(self.format_failure(new.getvalue()))\n\n* Also, the AssertionError message contains redundant newline character.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-134858\n* gh-134903\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/serhiy-storchaka","@type":"Person","name":"serhiy-storchaka"},"datePublished":"2025-05-28T17:40:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/134857/cpython/issues/134857"}