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Protect against failure to show local data....
Protect against failure to show local data. See https://github.com/napari/napari/pull/3201 where formatting traceback was failing and lead to silenced errors. With this change we instead get the rest of the traceback but without the local variables, which is still better.

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test_shimmodule.py
13 lines | 344 B | text/x-python | PythonLexer
import sys
import warnings
from IPython.utils.shimmodule import ShimWarning
def test_shim_warning():
sys.modules.pop('IPython.config', None)
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
import IPython.config
assert len(w) == 1
assert issubclass(w[-1].category, ShimWarning)