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Remove deprecated shell_streams and _parent_header shims - #1504
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shell_streams shimshell_streams and _parent_header shimsCarreau
commented
May 7, 2026
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Marking for 7.3, I always like removals. |
shell_streams (plural) was deprecated in ipykernel 6.0 (2021) in favor of shell_stream (singular). Remove the trait, default handler, observer, and associated test.
for more information, see https://pre-commit.ci
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682aaecCompareCarreau
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Jun 10, 2026
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there seem to be real error in CI with ipyparallel; not sure why it just hangs after a while |
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Jun 10, 2026
Prevent the removal of the shim in ipython/ipykernel#1504
Carreau
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Jun 11, 2026
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Fixed change in ipyparallel; this will need to wait a few month that the new version released and used more |
Carreau
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June 11, 2026 09:50
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Summary
Remove two deprecated compatibility shims from ipykernel 6.0 (2021):
shell_streams(plural) — deprecated in favor ofshell_stream(singular)_parent_headerproperty — deprecated in favor ofget_parent()Both have been emitting
DeprecationWarningfor 5 years.Changes
shell_streamstrait,_shell_streams_default, and_shell_streams_changedfromkernelbase.py_parent_headerdeprecated property fromkernelbase.pytest_deprecated_featurestest that covered bothNo behavioral change —
shell_streamandget_parent()remain the supported APIs.