python - 如何禁用 Python 警告？

Question

我正在处理使用 warnings 引发很多(对我而言)无用警告的代码。图书馆。阅读(/扫描)文档我只找到了一种方法to disable warnings for single functions .但我不想更改这么多代码。

是否有类似 python -no-warning foo.py 的标志？

你会推荐什么？

Answer 1

看看Temporarily Suppressing Warnings Python 文档部分:

If you are using code that you know will raise a warning, such as a deprecated function, but do not want to see the warning, then it is possible to suppress the warning using the catch_warnings context manager:

import warnings

def fxn():
    warnings.warn("deprecated", DeprecationWarning)

with warnings.catch_warnings():
    warnings.simplefilter("ignore")
    fxn()

我不宽恕它，但你可以取消所有警告:

import warnings
warnings.filterwarnings("ignore")

例如:

>>> import warnings
>>> def f():
...     print('before')
...     warnings.warn('you are warned!')
...     print('after')
...
>>> f()
before
<stdin>:3: UserWarning: you are warned!
after
>>> warnings.filterwarnings("ignore")
>>> f()
before
after