#35395: Python 3.12 filter bug with Django 4.2.11 ---------------------------------+-------------------------------------- Reporter: Tim Richardson | Owner: nobody Type: Bug | Status: closed Component: Template system | Version: 4.2 Severity: Normal | Resolution: needsinfo Keywords: | Triage Stage: Unreviewed Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 ---------------------------------+-------------------------------------- Comment (by Tim Richardson):
the slice() function is being interpreted as key in 3.12 but not in prior python versions. the calculation of bits is identical. Python 3.12 docs say that slice objects are now hashable, so it gets treated as a key I suppose. I wonder how it worked in prior python versions. Including KeyError in the caught exceptions restores consistent behaviour. {{{ def slice_filter(value, arg): """ Return a slice of the list using the same syntax as Python's list slicing. """ try: bits = [] for x in str(arg).split(":"): if not x: bits.append(None) else: bits.append(int(x)) return value[slice(*bits)] except (ValueError, TypeError, KeyError): return value # Fail silently. }}} -- Ticket URL: <https://code.djangoproject.com/ticket/35395#comment:4> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/0107018f05c1ebbd-d2d70ec5-4e81-4b40-a6a2-48120ecb27f7-000000%40eu-central-1.amazonses.com.