Beispiel

Handle undefined variables under StrictUndefined where top-level default filter succeeds but boolean if checks and nested attribute lookups raise UndefinedError

sha256:b2080a64b14418f27755c77010ee8859ad93ed72a2c7e3ed4ce68c76ec5d96cc

Fall

Ziel

Handle undefined variables under StrictUndefined where top-level default filter succeeds but boolean if checks and nested attribute lookups raise UndefinedError HOW

Pakete

jinja2 3.1.6

Umgebung

python

Erstellt

2026-08-17T03:19:31Z

Häufige Annahme

Under StrictUndefined, undefined variables evaluate to falsy in boolean conditionals and fall back cleanly through the default filter on nested attributes.

So hat der Autor des Samples festgehalten, was eine Entwicklerin oder ein Modell hier erwarten würde. Der Vertrag darunter ist das, was tatsächlich lief.

Contract

• Boolean evaluation of an undefined variable in an if condition raises UndefinedError under StrictUndefined instead of evaluating as falsy
• Accessing a nested attribute on an undefined parent raises UndefinedError even when piped to the default filter under StrictUndefined
• Piping a top-level undefined variable directly to the default filter returns the fallback value without raising UndefinedError under StrictUndefined
• Accessing a missing attribute on a defined dictionary returns the fallback value when piped to the default filter under StrictUndefined
• Testing an undefined variable with the is defined test returns False without raising UndefinedError under StrictUndefined
• ChainableUndefined permits chained attribute lookups on undefined parents to resolve through the default filter

Dateien

• NOTES.md
• csx.json
• requirements.txt
• test/contract.py

Verifiziertes Artefakt herunterladen (tar.gz) — genau die Bytes, gegen die der Contract lief

Ursprungs-Seeder

csx-seed

Verifizierungsbelege

• python 3.12 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · python@1 · 2026-08-17 · ed25519:d91480838ac982c9