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20f620ec54
Bumps [packaging](https://github.com/pypa/packaging) from 24.2 to 26.0. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/pypa/packaging/releases">packaging's releases</a>.</em></p> <blockquote> <h2>26.0</h2> <p>Read about the performance improvements here: <a href="https://iscinumpy.dev/post/packaging-faster">https://iscinumpy.dev/post/packaging-faster</a>.</p> <h2>What's Changed</h2> <p>Features:</p> <ul> <li>PEP 751: support pylock by <a href="https://github.com/sbidoul"><code>@sbidoul</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/900">pypa/packaging#900</a></li> <li>PEP 794: import name metadata by <a href="https://github.com/brettcannon"><code>@brettcannon</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/948">pypa/packaging#948</a></li> <li>Support writing metadata by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/846">pypa/packaging#846</a></li> <li>Support <code>__replace__</code> for <code>Version</code> by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/1003">pypa/packaging#1003</a></li> <li>Support positional pattern matching for <code>Version</code> and <code>Specifier</code> by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/1004">pypa/packaging#1004</a></li> </ul> <p>Behavior adaptations:</p> <ul> <li>PEP 440 handling of prereleases for <code>Specifier.contains</code>, <code>SpecifierSet.contains</code>, and <code>SpecifierSet.filter</code> by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/897">pypa/packaging#897</a></li> <li>Handle PEP 440 edge case in <code>SpecifierSet.filter</code> by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/942">pypa/packaging#942</a></li> <li>Adjust arbitrary equality intersection preservation in <code>SpecifierSet</code> by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/951">pypa/packaging#951</a></li> <li>Return <code>False</code> instead of raising for <code>.contains</code> with invalid version by <a href="https://github.com/Liam-DeVoe"><code>@Liam-DeVoe</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/932">pypa/packaging#932</a></li> <li>Support arbitrary equality on arbitrary strings for <code>Specifier</code> and <code>SpecifierSet</code>'s <code>filter</code> and <code>contains</code> method. by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/954">pypa/packaging#954</a></li> <li>Only try to parse as <code>Version</code> on certain marker keys, return <code>False</code> on unequal ordered comparsions by <a href="https://github.com/JP-Ellis"><code>@JP-Ellis</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/939">pypa/packaging#939</a></li> </ul> <p>Fixes:</p> <ul> <li>Update <code>_hash</code> when unpickling <code>Tag()</code> by <a href="https://github.com/dholth"><code>@dholth</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/860">pypa/packaging#860</a></li> <li>Correct comment and simplify implicit prerelease handling in <code>Specifier.prereleases</code> by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/896">pypa/packaging#896</a></li> <li>Use explicit <code>_GLibCVersion</code> <code>NamedTuple</code> in <code>_manylinux</code> by <a href="https://github.com/cthoyt"><code>@cthoyt</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/868">pypa/packaging#868</a></li> <li>Detect invalid license expressions containing <code>()</code> by <a href="https://github.com/bwoodsend"><code>@bwoodsend</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/879">pypa/packaging#879</a></li> <li>Correct regex for metadata <code>'name'</code> format by <a href="https://github.com/di"><code>@di</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/925">pypa/packaging#925</a></li> <li>Improve the message around expecting a semicolon by <a href="https://github.com/pradyunsg"><code>@pradyunsg</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/833">pypa/packaging#833</a></li> <li>Support nested parens in license expressions by <a href="https://github.com/Liam-DeVoe"><code>@Liam-DeVoe</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/931">pypa/packaging#931</a></li> <li>Add space before at symbol in <code>Requirements</code> string by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/953">pypa/packaging#953</a></li> <li>A root logger use found by ruff LOG, use <code>packaging</code> logger instead by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/965">pypa/packaging#965</a></li> <li>Better support for subclassing <code>Marker</code> and <code>Requirement</code> by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/1022">pypa/packaging#1022</a></li> <li>Normalize all extras, not just if it comes first by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/1024">pypa/packaging#1024</a></li> <li>Don't produce a broken repr if <code>Marker</code> fails to construct by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/1033">pypa/packaging#1033</a></li> </ul> <p>Performance:</p> <ul> <li>Avoid recompiling regexes in the tokenizer for a 3x speedup by <a href="https://github.com/hauntsaninja"><code>@hauntsaninja</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/1019">pypa/packaging#1019</a></li> <li>Improve performance in <code>_manylinux.py</code> by <a href="https://github.com/cthoyt"><code>@cthoyt</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/869">pypa/packaging#869</a></li> <li>Minor cleanups to <code>Version</code> by <a href="https://github.com/bearomorphism"><code>@bearomorphism</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/913">pypa/packaging#913</a></li> <li>Skip redundant creation of <code>Version</code>s in specifier comparison by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/986">pypa/packaging#986</a></li> <li>Cache <code>Specifier</code>'s Version by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/985">pypa/packaging#985</a></li> <li>Make <code>Version</code> a little faster by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/987">pypa/packaging#987</a></li> <li>Minor <code>Version</code> regex cleanup by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/990">pypa/packaging#990</a></li> <li>Faster regex on Python 3.11.5+ by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/988">pypa/packaging#988</a> and <a href="https://redirect.github.com/pypa/packaging/pull/1055">pypa/packaging#1055</a></li> <li>Lazily calculate <code>_key</code> in <code>Version</code> by <a href="https://github.com/notatallshaw"><code>@notatallshaw</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/989">pypa/packaging#989</a> and regression for <code>packaging_legacy</code> fixed by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/1048">pypa/packaging#1048</a></li> <li>Faster <code>canonicalize_version</code> by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/993">pypa/packaging#993</a></li> <li>Use <code>fullmatch</code> in a couple more places by <a href="https://github.com/henryiii"><code>@henryiii</code></a> in <a href="https://redirect.github.com/pypa/packaging/pull/992">pypa/packaging#992</a></li> </ul> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/pypa/packaging/blob/main/CHANGELOG.rst">packaging's changelog</a>.</em></p> <blockquote> <p>26.0 - 2026-01-20</p> <pre><code> Features: <ul> <li>PEP 751: support pylock (:pull:<code>900</code>)</li> <li>PEP 794: import name metadata (:pull:<code>948</code>)</li> <li>Support for writing metadata to a file (:pull:<code>846</code>)</li> <li>Support <code>__replace__</code> on Version (:pull:<code>1003</code>)</li> <li>Support positional pattern matching for <code>Version</code> and <code>SpecifierSet</code> (:pull:<code>1004</code>)</li> </ul> <p>Behavior adaptations:</p> <ul> <li>PEP 440 handling of prereleases for <code>Specifier.contains</code>, <code>SpecifierSet.contains</code>, and <code>SpecifierSet.filter</code> (:pull:<code>897</code>)</li> <li>Handle PEP 440 edge case in <code>SpecifierSet.filter</code> (:pull:<code>942</code>)</li> <li>Adjust arbitrary equality intersection preservation in <code>SpecifierSet</code> (:pull:<code>951</code>)</li> <li>Return <code>False</code> instead of raising for <code>.contains</code> with invalid version (:pull:<code>932</code>)</li> <li>Support arbitrary equality on arbitrary strings for <code>Specifier</code> and <code>SpecifierSet</code>'s <code>filter</code> and <code>contains</code> method. (:pull:<code>954</code>)</li> <li>Only try to parse as <code>Version</code> on certain marker keys, return <code>False</code> on unequal ordered comparisons (:pull:<code>939</code>)</li> </ul> <p>Fixes:</p> <ul> <li>Update <code>_hash</code> when unpickling <code>Tag()</code> (:pull:<code>860</code>)</li> <li>Correct comment and simplify implicit prerelease handling in <code>Specifier.prereleases</code> (:pull:<code>896</code>)</li> <li>Use explicit <code>_GLibCVersion</code> <code>NamedTuple</code> in <code>_manylinux</code> (:pull:<code>868</code>)</li> <li>Detect invalid license expressions containing <code>()</code> (:pull:<code>879</code>)</li> <li>Correct regex for metadata <code>'name'</code> format (:pull:<code>925</code>)</li> <li>Improve the message around expecting a semicolon (:pull:<code>833</code>)</li> <li>Support nested parens in license expressions (:pull:<code>931</code>)</li> <li>Add space before at symbol in <code>Requirements</code> string (:pull:<code>953</code>)</li> <li>A root logger use found, use a <code>packaging</code> logger instead (:pull:<code>965</code>)</li> <li>Better support for subclassing <code>Marker</code> and <code>Requirement</code> (:pull:<code>1022</code>)</li> <li>Normalize all extras, not just if it comes first (:pull:<code>1024</code>)</li> <li>Don't produce a broken repr if <code>Marker</code> fails to construct (:pull:<code>1033</code>)</li> </ul> <p>Performance:</p> <ul> <li>Avoid recompiling regexes in the tokenizer for a 3x speedup (:pull:<code>1019</code>)</li> <li>Improve performance in <code>_manylinux.py</code> (:pull:<code>869</code>)</li> <li>Minor cleanups to <code>Version</code> (:pull:<code>913</code>)</li> <li>Skip redundant creation of <code>Version</code>'s in specifier comparison (:pull:<code>986</code>)</li> <li>Cache the <code>Specifier</code>'s <code>Version</code> (:pull:<code>985</code>)</li> <li>Make <code>Version</code> a little faster (:pull:<code>987</code>)</li> <li>Minor <code>Version</code> regex cleanup (:pull:<code>990</code>)</li> <li>Faster regex on Python 3.11.5+ for <code>Version</code> (:pull:<code>988</code>, :pull:<code>1055</code>)</li> <li>Lazily calculate <code>_key</code> in <code>Version</code> (:pull:<code>989</code>, :pull:<code>1048</code>)</li> <li>Faster <code>canonicalize_version</code> (:pull:<code>993</code>)</li> <li>Use <code>re.fullmatch</code> in a couple more places (:pull:<code>992</code>, :pull:<code>1029</code>)</li> <li>Use <code>map</code> instead of generator (:pull:<code>996</code>)</li> <li>Deprecate <code>._version</code> (<code>_Version</code>, a <code>NamedTuple</code>) (:pull:<code>995</code>, :pull:<code>1062</code>)<br /> </tr></table><br /> </code></pre></li> </ul> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href="3b77a26f5a"><code>3b77a26</code></a> Bump for release</li> <li><a href="31371cce59"><code>31371cc</code></a> docs: prepare for 26.0 final (<a href="https://redirect.github.com/pypa/packaging/issues/1063">#1063</a>)</li> <li><a href="9627a8821f"><code>9627a88</code></a> perf: dual replace (<a href="https://redirect.github.com/pypa/packaging/issues/1064">#1064</a>)</li> <li><a href="d5398b8bc1"><code>d5398b8</code></a> fix: restore ._version as a compat shim (<a href="https://redirect.github.com/pypa/packaging/issues/1062">#1062</a>)</li> <li><a href="3a7b600a12"><code>3a7b600</code></a> Bump for development</li> <li><a href="d4eefdccf9"><code>d4eefdc</code></a> Bump for release</li> <li><a href="46189124fb"><code>4618912</code></a> docs: prepare for 26.0rc3 (<a href="https://redirect.github.com/pypa/packaging/issues/1060">#1060</a>)</li> <li><a href="0cf1b41b4b"><code>0cf1b41</code></a> ci: test on first public release of CPythons (<a href="https://redirect.github.com/pypa/packaging/issues/1056">#1056</a>)</li> <li><a href="716beb1c0a"><code>716beb1</code></a> perf: 10% faster stripping zeros (<a href="https://redirect.github.com/pypa/packaging/issues/1058">#1058</a>)</li> <li><a href="350a230670"><code>350a230</code></a> fix: support CPython 3.11.0-3.11.4 and older PyPy3.11 (<a href="https://redirect.github.com/pypa/packaging/issues/1055">#1055</a>)</li> <li>Additional commits viewable in <a href="https://github.com/pypa/packaging/compare/24.2...26.0">compare view</a></li> </ul> </details> <br /> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. 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Packages
Important
This repository is structured as a monorepo, with various packages located in this libs/ directory. Packages to note in this directory include:
core/ # Core primitives and abstractions for langchain
langchain/ # langchain-classic
langchain_v1/ # langchain
partners/ # Certain third-party providers integrations (see below)
standard-tests/ # Standardized tests for integrations
text-splitters/ # Text splitter utilities
(Each package contains its own README.md file with specific details about that package.)
Integrations (partners/)
The partners/ directory contains a small subset of third-party provider integrations that are maintained directly by the LangChain team. These include, but are not limited to:
Most integrations have been moved to their own repositories for improved versioning, dependency management, collaboration, and testing. This includes packages from popular providers such as Google and AWS. Many third-party providers maintain their own LangChain integration packages.
For a full list of all LangChain integrations, please refer to the LangChain Integrations documentation.