René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Constants(titles='dr') silently shreds a bare string into characters","articleBody":"Every `Iterable[str]` parameter on `Constants.__init__` accepts a bare `str`, which *is* an iterable — of characters. `SetManager.__init__` (config/__init__.py, `self.elements = set(elements)`) then builds a set of single characters, silently replacing the entire default set.\n\nRepro:\n\n```python\nfrom nameparser import HumanName\nfrom nameparser.config import Constants\n\nc = Constants(titles='dr')\nc.titles                    # SetManager({'d', 'r'}) — 600+ defaults gone\nHumanName('Dr John Smith', constants=c)\n# title='', first='Dr', last='Smith' — silently wrong, no error anywhere\n```\n\nThe same applies to all SetManager-backed keyword arguments. This is the same pattern family as #226: caller hands in configuration, the library silently destroys the intent. Debugging it later means diffing large constant sets.\n\nFix: reject `str`/`bytes` in `SetManager.__init__` (or at the `Constants.__init__` boundary) with a `TypeError` suggesting the fix, e.g. ``expected an iterable of strings, got a single string — wrap it: ['dr']``.\n\nFound by review of PR #237 — pre-existing, unrelated to that change.","author":{"url":"https://github.com/derek73","@type":"Person","name":"derek73"},"datePublished":"2026-07-06T00:49:28.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/238/python-nameparser/issues/238"}