Can't suppress warnings

I would like to suppress some warnings. Normally I could use the following code to do suppress all warnings.

import warnings
warnings.filterwarnings('ignore')

But when I import nvidia.dali there is still a warning shown. It looks like this comes from backend.py:

def deprecation_warning(what):
    # show only this warning
    with warnings.catch_warnings():
        warnings.simplefilter("default")
        warnings.warn(what, Warning, stacklevel=2)

The simplefilter just overwrites all previously changed warning setting. You could set the filter to lowest priority to not override everything already set with: warnings.simplefilter("default", append=True)

Or is there something I am missing? Thanks already.