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bpo-41003: Fix test_copyreg when numpy is installed (GH-20935) (GH-20945)

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Fix test_copyreg when numpy is installed: test.pickletester now
saves/restores warnings.filters when importing numpy, to ignore
filters installed by numpy.

Add the save_restore_warnings_filters() function to the
test.support.warnings_helper module.

(cherry picked from commit 8362893e3f)
This commit is contained in:
Victor Stinner 2020-06-17 18:40:14 +02:00 • committed by GitHub
parent 2c6d6c12c2
commit b39d41ba1b
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4 changed files with 29 additions and 13 deletions
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16
Lib/test/pickletester.py
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@ -21,19 +21,25 @@ try:
except ImportError:
_testbuffer = None
try:
import numpy as np
except ImportError:
np = None
from test import support
from test.support import (
TestFailed, TESTFN, run_with_locale, no_tracing,
_2G, _4G, bigmemtest, reap_threads, forget,
save_restore_warnings_filters
)
from pickle import bytes_types
# bpo-41003: Save/restore warnings filters to leave them unchanged.
# Ignore filters installed by numpy.
try:
with save_restore_warnings_filters():
import numpy as np
except ImportError:
np = None
requires_32b = unittest.skipUnless(sys.maxsize < 2**32,
"test is only meaningful on 32-bit builds")