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<div class="section" id="asynchronous-operations">
<h1>Asynchronous Operations<a class="headerlink" href="#asynchronous-operations" title="Permalink to this headline">¶</a></h1>
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<h2>@defer.inlineCallbacks support<a class="headerlink" href="#defer-inlinecallbacks-support" title="Permalink to this headline">¶</a></h2>
<p>If you want a deferred async method, just use <em>defer.returnValue()</em>:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">"/"</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="nd">@defer.inlineCallbacks</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">val1</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">"SELECT ...."</span><span class="p">)</span>
<span class="n">val2</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">"SELECT ...."</span><span class="p">)</span>
<span class="n">defer</span><span class="o">.</span><span class="n">returnValue</span><span class="p">(</span><span class="n">val1</span> <span class="o">+</span> <span class="n">val2</span><span class="p">)</span>
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<p>This is standard Twisted functionality.</p>
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