Sourced from more-itertools's releases.

Version 11.0.1

This release restores pairwise, which was mistakenly removed in 11.0.0 instead of being deprecated. It is now marked as deprecated and will be removed in a future major release. Use itertools.pairwise as a replacement.

Version 11.0.0

Potentially breaking changes

• Python 3.9 support was dropped, since it went EOL on 2025-10-31
• callback_iter is deprecated. It will be removed in a future major release.
• iequals no longer returns True when called with ([], [ANY]) (thanks to rhettinger and pochmann3)
• The pred argument for locate and replace must now be able to handle a variable number of arguments. See their docstrings for details. (thanks to veeceey, james-wasson, and pochmann3)
• unique_everseen now raises TypeError when input elements are not hashable. The silent fallback mechanism for unhashable inputs has been removed. (thanks to rhettinger and karlicoss)
• windowed now raises ValueError when given a window size of 0 (thanks to rhettinger and brevzin)
• Parameter names for flatten, iter_except, repeatfunc, prepend, transpose, and sum_of_squares have been changed. Code that uses these functions will need to be updated if it uses keywords for positional arguments. (thanks to rhettinger)

New functions

• concurrent_tee: similar to tee, but with guaranteed threading semantics (thanks to rhettinger)
• random_derangement: returns a random derangement of elements from an iterable (thanks to rhettinger)
• running_mean: yields the mean of values in an iterable, or in a sliding window (thanks to rhettinger)
• running_statistics: provides statistics for the values in an iterable, or in a sliding window (thanks to rhettinger)
• serialize: wraps a non-concurrent iterator with a lock to enforce sequential access (thanks to rhettinger)
• synchronized: wraps an iterator-returning callable to make its iterators thread-safe (thanks to rhettinger)
• sized_iterator: wraps an iterable with a known length and implements __len__ (thanks to assaf127)

Changes to existing functions

• The type hints for always_iterable were improved (thanks to rhettinger and maltevesper)
• A potential bug in callback_iter was fixed
• A bug in exactly_n's handling of negative arguments was fixed (thanks to rhettinger)
• extract`` now accepts a monotonic` argument for improved performance (thanks to rhettinger)
• A bug in numeric_range's handling of negative steps was fixed (thanks to bysiber)
• grouper implementation was updated to match the itertools docs (thanks to rhettinger)
• nth_product, product_index, gray_product, partial_product, nth_product, product_index, and random_product now accept a repeat keyword argument (thanks to rhettinger)
• powerset_of_sets can now construct frozenset instances (thanks to rhettinger)
• The type hints for stagger were improved (thanks to nathanjmcdougall)
• Memory efficiency was improved for partition was improved (thanks to rhettinger and yueyinqiu)
• Performance for the functions count_cycle, difference, random_product, was improved nth_combination, nth_combination_with_replacement,

... (truncated)

• 5ea81c4 Merge pull request #1142 from more-itertools/version-11.0.1
• 2fcf9ef Changes for version 11.0.1
• 52cfcfe Revert "Remove pairwise()"
• 5b43c0d Merge pull request #1136 from more-itertools/version-11.0.0
• 499213b Merge pull request #1140 from rhettinger/nits
• 8fb18b9 Nit: Add --upgrade to the pip installs
• afe23fc Nit: Remove outdated fabfile.py from the manifest
• 4930555 Nit: move reshape() and transpose() to the math section
• 06626d5 callback_iter is deprecated
• c91ba4e Fix formatting in unique_everseen
• Additional commits viewable in compare view

Sourced from ruff's releases.

0.15.9

Release Notes

Released on 2026-04-02.

Preview features

• [pyflakes] Flag annotated variable redeclarations as F811 in preview mode (#24244)
• [ruff] Allow dunder-named assignments in non-strict mode for RUF067 (#24089)

Bug fixes

• [flake8-errmsg] Avoid shadowing existing msg in fix for EM101 (#24363)
• [flake8-simplify] Ignore pre-initialization references in SIM113 (#24235)
• [pycodestyle] Fix W391 fixes for consecutive empty notebook cells (#24236)
• [pyupgrade] Fix UP008 nested class matching (#24273)
• [pyupgrade] Ignore strings with string-only escapes (UP012) (#16058)
• [ruff] RUF072: skip formfeeds on dedent (#24308)
• [ruff] Avoid re-using symbol in RUF024 fix (#24316)
• [ruff] Parenthesize expression in RUF050 fix (#24234)
• Disallow starred expressions as values of starred expressions (#24280)

Rule changes

• [flake8-simplify] Suppress SIM105 for except* before Python 3.12 (#23869)
• [pyflakes] Extend F507 to flag %-format strings with zero placeholders (#24215)
• [pyupgrade] UP018 should detect more unnecessarily wrapped literals (UP018) (#24093)
• [pyupgrade] Fix UP008 callable scope handling to support lambdas (#24274)
• [ruff] RUF010: Mark fix as unsafe when it deletes a comment (#24270)

Formatter

• Add nested-string-quote-style formatting option (#24312)

Documentation

• [flake8-bugbear] Clarify RUF071 fix safety for non-path string comparisons (#24149)
• [flake8-type-checking] Clarify import cycle wording for TC001/TC002/TC003 (#24322)

Other changes

• Avoid rendering fix lines with trailing whitespace after | (#24343)

Contributors

• @​charliermarsh
• @​MichaReiser
• @​tranhoangtu-it
• @​dylwil3
• @​zsol

... (truncated)

Sourced from ruff's changelog.

0.15.9

Released on 2026-04-02.

Preview features

• [pyflakes] Flag annotated variable redeclarations as F811 in preview mode (#24244)
• [ruff] Allow dunder-named assignments in non-strict mode for RUF067 (#24089)

Bug fixes

• [flake8-errmsg] Avoid shadowing existing msg in fix for EM101 (#24363)
• [flake8-simplify] Ignore pre-initialization references in SIM113 (#24235)
• [pycodestyle] Fix W391 fixes for consecutive empty notebook cells (#24236)
• [pyupgrade] Fix UP008 nested class matching (#24273)
• [pyupgrade] Ignore strings with string-only escapes (UP012) (#16058)
• [ruff] RUF072: skip formfeeds on dedent (#24308)
• [ruff] Avoid re-using symbol in RUF024 fix (#24316)
• [ruff] Parenthesize expression in RUF050 fix (#24234)
• Disallow starred expressions as values of starred expressions (#24280)

Rule changes

• [flake8-simplify] Suppress SIM105 for except* before Python 3.12 (#23869)
• [pyflakes] Extend F507 to flag %-format strings with zero placeholders (#24215)
• [pyupgrade] UP018 should detect more unnecessarily wrapped literals (UP018) (#24093)
• [pyupgrade] Fix UP008 callable scope handling to support lambdas (#24274)
• [ruff] RUF010: Mark fix as unsafe when it deletes a comment (#24270)

Formatter

• Add nested-string-quote-style formatting option (#24312)

Documentation

• [flake8-bugbear] Clarify RUF071 fix safety for non-path string comparisons (#24149)
• [flake8-type-checking] Clarify import cycle wording for TC001/TC002/TC003 (#24322)

Other changes

• Avoid rendering fix lines with trailing whitespace after | (#24343)

Contributors

• @​charliermarsh
• @​MichaReiser
• @​tranhoangtu-it
• @​dylwil3
• @​zsol
• @​renovate

... (truncated)

• 724ccc1 Bump 0.15.9 (#24369)
• 96d9e09 [ty] Move the deferred submodule inside infer/builder (#24368)
• 130da28 [ty] Infer the extra_items keyword argument to class-based TypedDicts as an...
• a617c54 [ty] Validate type qualifiers in functional TypedDict fields and the `extra_i...
• d851708 [ty] Improve robustness of various type-qualifier-related checks (#24251)
• aecb587 Only run the release-gate on workflow dispatch (#24366)
• b889571 [ty] Use infer_type_expression for parsing parameter annotations and return...
• 3286a62 Add a "release-gate" step to the release workflow (#24365)
• 5f88756 Disallow starred expressions as values of starred expressions (#24280)
• 5c59f8a [pyupgrade] Ignore strings with string-only escapes (UP012) (#16058)
• Additional commits viewable in compare view

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