python config_error ai_generated true

AssertionError: assert False + where False = <function is_valid at 0x...>(123)

ID: python/pytest-assertion-rewrite-disabled

Also available as: JSON · Markdown · 中文
80%Fix Rate
82%Confidence
0Evidence
2024-06-11First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7.x active — — —
8.x active — — —

Root Cause

Assertion rewriting was disabled (via --assert=plain, PYTHONDONTWRITEBYTECODE, or a plugin conflict), so pytest cannot introspect the sub-expression that produced False and prints only the raw assert.

generic

中文

断言重写被禁用（通过 --assert=plain、PYTHONDONTWRITEBYTECODE 或插件冲突），pytest 无法内省产生 False 的子表达式，只打印原始 assert。

Workarounds

  1. 90% success 
    # pytest.ini
[pytest]
addopts = --assert=rewrite
# ensure no PYTHONDONTWRITEBYTECODE=1 in env
  2. 85% success 
    # conftest.py
import pytest
pytest.register_assert_rewrite('tests.test_api')

Dead Ends

Common approaches that don't work:

  1. 80% fail

    -s disables output capture, not assertion rewriting; the introspection message remains absent.

  2. 60% fail

    This defeats the purpose of pytest's introspection and pollutes test output with manual prints.