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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Conversions between various states of Rust and Python types and their wrappers."><meta name="keywords" content="rust, rustlang, rust-lang, conversion"><title>pyo3::conversion - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../../pyo3/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Module conversion</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#traits">Traits</a></li></ul></div><p class="location"><a href="../index.html">pyo3</a></p><div id="sidebar-vars" data-name="conversion" data-ty="mod" data-relpath="../"></div><script defer src="../sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" height="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Module <a href="../index.html">pyo3</a>::<wbr><a class="mod" href="">conversion</a><button id="copy-path" onclick="copy_path(this)">⎘</button></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span><a class="srclink" href="../../src/pyo3/conversion.rs.html#3-521" title="goto source code">[src]</a></span></h1><div class="docblock"><p>Conversions between various states of Rust and Python types and their wrappers.</p>
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</div><h2 id="traits" class="section-header"><a href="#traits">Traits</a></h2>
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<table><tr class="module-item"><td><a class="trait" href="trait.AsPyPointer.html" title="pyo3::conversion::AsPyPointer trait">AsPyPointer</a></td><td class="docblock-short"><p>This trait represents that <strong>we can do zero-cost conversion from the object
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to a FFI pointer</strong>.</p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.FromPyObject.html" title="pyo3::conversion::FromPyObject trait">FromPyObject</a></td><td class="docblock-short"><p><code>FromPyObject</code> is implemented by various types that can be extracted from
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a Python object reference.</p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.FromPyPointer.html" title="pyo3::conversion::FromPyPointer trait">FromPyPointer</a></td><td class="docblock-short"><p>Raw level conversion between <code>*mut ffi::PyObject</code> and PyO3 types.</p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.IntoPy.html" title="pyo3::conversion::IntoPy trait">IntoPy</a></td><td class="docblock-short"><p>Similar to <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="std::convert::Into">std::convert::Into</a>, just that it requires a gil token.</p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.IntoPyPointer.html" title="pyo3::conversion::IntoPyPointer trait">IntoPyPointer</a></td><td class="docblock-short"><p>This trait allows retrieving the underlying FFI pointer from Python objects.</p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.PyTryFrom.html" title="pyo3::conversion::PyTryFrom trait">PyTryFrom</a></td><td class="docblock-short"><p>Trait implemented by Python object types that allow a checked downcast.
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If <code>T</code> implements <code>PyTryFrom</code>, we can convert <code>&PyAny</code> to <code>&T</code>.</p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.PyTryInto.html" title="pyo3::conversion::PyTryInto trait">PyTryInto</a></td><td class="docblock-short"><p>Trait implemented by Python object types that allow a checked downcast.
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This trait is similar to <code>std::convert::TryInto</code></p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.ToBorrowedObject.html" title="pyo3::conversion::ToBorrowedObject trait">ToBorrowedObject</a></td><td class="docblock-short"><p>This trait has two implementations: The slow one is implemented for
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all <a href="trait.ToPyObject.html" title="ToPyObject">ToPyObject</a> and creates a new object using <a href="trait.ToPyObject.html#tymethod.to_object" title="ToPyObject::to_object">ToPyObject::to_object</a>,
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while the fast one is only implemented for AsPyPointer (we know
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that every AsPyPointer is also ToPyObject) and uses <a href="trait.AsPyPointer.html#tymethod.as_ptr" title="AsPyPointer::as_ptr()">AsPyPointer::as_ptr()</a></p>
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</td></tr><tr class="module-item"><td><a class="trait" href="trait.ToPyObject.html" title="pyo3::conversion::ToPyObject trait">ToPyObject</a></td><td class="docblock-short"><p>Conversion trait that allows various objects to be converted into <code>PyObject</code>.</p>
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