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<div class="section" id="module-pymongo.read_concern">
<span id="read-concern-tools-for-working-with-read-concern"></span><h1><code class="xref py py-mod docutils literal notranslate"><span class="pre">read_concern</span></code> – Tools for working with read concern.<a class="headerlink" href="#module-pymongo.read_concern" title="Permalink to this headline">¶</a></h1>
<p>Tools for working with read concerns.</p>
<dl class="class">
<dt id="pymongo.read_concern.ReadConcern">
<em class="property">class </em><code class="descclassname">pymongo.read_concern.</code><code class="descname">ReadConcern</code><span class="sig-paren">(</span><em>level=None</em><span class="sig-paren">)</span><a class="headerlink" href="#pymongo.read_concern.ReadConcern" title="Permalink to this definition">¶</a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><cite>level</cite>: (string) The read concern level specifies the level of
isolation for read operations. For example, a read operation using a
read concern level of <code class="docutils literal notranslate"><span class="pre">majority</span></code> will only return data that has been
written to a majority of nodes. If the level is left unspecified, the
server default will be used.</li>
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<div class="versionadded">
<p><span class="versionmodified">New in version 3.2.</span></p>
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<dl class="attribute">
<dt id="pymongo.read_concern.ReadConcern.document">
<code class="descname">document</code><a class="headerlink" href="#pymongo.read_concern.ReadConcern.document" title="Permalink to this definition">¶</a></dt>
<dd><p>The document representation of this read concern.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last"><a class="reference internal" href="#pymongo.read_concern.ReadConcern" title="pymongo.read_concern.ReadConcern"><code class="xref py py-class docutils literal notranslate"><span class="pre">ReadConcern</span></code></a> is immutable. Mutating the value of
<a class="reference internal" href="#pymongo.read_concern.ReadConcern.document" title="pymongo.read_concern.ReadConcern.document"><code class="xref py py-attr docutils literal notranslate"><span class="pre">document</span></code></a> does not mutate this <a class="reference internal" href="#pymongo.read_concern.ReadConcern" title="pymongo.read_concern.ReadConcern"><code class="xref py py-class docutils literal notranslate"><span class="pre">ReadConcern</span></code></a>.</p>
</div>
</dd></dl>
<dl class="attribute">
<dt id="pymongo.read_concern.ReadConcern.level">
<code class="descname">level</code><a class="headerlink" href="#pymongo.read_concern.ReadConcern.level" title="Permalink to this definition">¶</a></dt>
<dd><p>The read concern level.</p>
</dd></dl>
<dl class="attribute">
<dt id="pymongo.read_concern.ReadConcern.ok_for_legacy">
<code class="descname">ok_for_legacy</code><a class="headerlink" href="#pymongo.read_concern.ReadConcern.ok_for_legacy" title="Permalink to this definition">¶</a></dt>
<dd><p>Return <code class="docutils literal notranslate"><span class="pre">True</span></code> if this read concern is compatible with
old wire protocol versions.</p>
</dd></dl>
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