如何禁用内部 pytest 警告？答案

【问题标题】：How to disable internal pytest warnings?如何禁用内部 pytest 警告？
【发布时间】：2020-05-21 06:59:43
【问题描述】：

我想禁用 pytest.ini 中的所有 pytest 内部警告，例如 PytestCacheWarning，但目前没有运气。以下 ini 文件无法按我的预期工作：

[pytest]
filterwarnings:
    ignore::pytest.PytestCacheWarning

正确的做法是什么？注意：我不想禁用所有警告，只禁用那些在 pytest 实现中定义的警告。

最小的可重现示例：

1) 创建以下结构：

some_dir/
    .pytest_cache/
    test_something.py
    pytest.ini

2) 将其放入test_something.py 文件中：

def test_something():
    assert False

3) 将其放入pytest.ini 文件中：

[pytest]
filterwarnings:
    ignore::pytest.PytestCacheWarning

4) 执行chmod 444 .pytest_cache 以产生PytestCacheWarning: could not create cache path 警告

5) 运行pytest:

========================== test session starts ===========================
platform linux -- Python 3.7.6, pytest-5.3.5, py-1.8.1, pluggy-0.13.1
rootdir: /home/sanyash/repos/reproduce_pytest_bug, inifile: pytest.ini
plugins: celery-4.4.0, aiohttp-0.3.0
collected 1 item                                                         

test_something.py F                                                [100%]

================================ FAILURES ================================
_____________________________ test_something _____________________________

    def test_something():
>       assert False
E       assert False

test_something.py:2: AssertionError
============================ warnings summary ============================
/home/sanyash/.local/lib/python3.7/site-packages/_pytest/cacheprovider.py:137
  /home/sanyash/.local/lib/python3.7/site-packages/_pytest/cacheprovider.py:137: PytestCacheWarning: could not create cache path /home/sanyash/repos/reproduce_pytest_bug/.pytest_cache/v/cache/stepwise
    self.warn("could not create cache path {path}", path=path)

/home/sanyash/.local/lib/python3.7/site-packages/_pytest/cacheprovider.py:137
  /home/sanyash/.local/lib/python3.7/site-packages/_pytest/cacheprovider.py:137: PytestCacheWarning: could not create cache path /home/sanyash/repos/reproduce_pytest_bug/.pytest_cache/v/cache/nodeids
    self.warn("could not create cache path {path}", path=path)

/home/sanyash/.local/lib/python3.7/site-packages/_pytest/cacheprovider.py:137
  /home/sanyash/.local/lib/python3.7/site-packages/_pytest/cacheprovider.py:137: PytestCacheWarning: could not create cache path /home/sanyash/repos/reproduce_pytest_bug/.pytest_cache/v/cache/lastfailed
    self.warn("could not create cache path {path}", path=path)

-- Docs: https://docs.pytest.org/en/latest/warnings.html
===================== 1 failed, 3 warnings in 0.03s ======================

【问题讨论】：

标签： python warnings pytest

【解决方案1】：

你必须使用导入路径忽略它：

[pytest]
filterwarnings =
    ignore::pytest.PytestCacheWarning

所以对于所有 pytest 警告，您将使用公共基类：

[pytest]
filterwarnings =
    ignore::pytest.PytestWarning

【讨论】：

感谢您的回答，但还是不行。我稍微改变了我的问题以包含可重现的示例，并从 PytestAssertRewriteWarning 切换到 PytestCacheWarning。
谢谢，通读the docs 看来我的答案应该是可行的，所以这可能是 pytest 的问题。我建议在 pytest github 上提交问题。
如果您有兴趣：github.com/pytest-dev/pytest/issues/6681