<span class="hljs-keyword">def</span> <span class="hljs-title function_">f</span>(<span class="hljs-params">x: <span class="hljs-built_in">int</span>, *, y: <span class="hljs-built_in">bool</span> = <span class="hljs-literal">True</span></span>) -&gt; <span class="hljs-literal">None</span>:
    <span class="hljs-keyword">pass</span>