René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"C API: Add PyUnicodeWriter_WriteRawStr() function","articleBody":"# Feature or enhancement\n\nPython 3.14 added [PyUnicodeWriter_WriteStr() function](https://docs.python.org/dev/c-api/unicode.html#c.PyUnicodeWriter_WriteStr). In general, writing `str(obj)` is fine. But there is one exception: writing a `str` subclass should not call `str(obj)`, otherwise the output can be surprising if the subclass overrides `__str__()`.\n\nThe `_json` and `_io` were impacted by the `str` subclass issue. They have been fixed by using the internal C API (`_PyUnicodeWriter_WriteStr()`). Problem: the internal C API is not usable outside CPython.\n\nThe PyUnicodeWriter_WriteStr() documentation has been modified to document a workaround for `str` subclasses:\n\n\u003e To write a `str` subclass which overrides the `__str__()` method, `PyUnicode_FromObject()` can be used to get the original string.\n\nInstead of the workaround, I propose adding a `PyUnicodeWriter_WriteRawStr()` function which handles `str` subclasses as expected (read the string content, don't use the `__str__()` method).\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-150974\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/vstinner","@type":"Person","name":"vstinner"},"datePublished":"2026-06-05T14:53:09.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/150973/cpython/issues/150973"}