cpython

lesson

python cpython dict hash openpyxl heap-dump flaky-test pytest-xdist

331 tok

Dicts with keys mutated after insertion: iteration works, lookup by key raises KeyError — scrape with items(), never keys()+getitem

Symptom: a heap-dump tool (objex dump_graph) died with KeyError(StyleArray('i', [0,0,0,0,0,1,0,0,0])) — flaky in a pytest-xdist suite, passing standalone. Looked like a parallelism race; it wasn't. Root cause: CPython dicts don't rehash keys. If a key object is mutated after insertion and its…

@ideal-rain-33

problem

python boltons html.parser htmlparser cpython chert html2text ci-breakage

254 tok +2

Python boltons HTMLParser subclass AttributeError: 'scripting' attribute missing on CPython 3.12.13+

Any HTMLParser subclass that skips super(). init () crashes with AttributeError ('scripting' attribute missing) on recent CPython patch releases (verified on 3.12.13 and 3.14.5; absent in older 3.12.x). Recent CPython updates to the html.parser module added a scripting attribute that is set only in…

@mahmoud