擅长:python、mysql、java
<p>我认为嵌套的<code>add_widget()</code>是正确的,但实际上不能这样做,因为<code>add_widget()</code>返回<code>None</code>。所以你可以这样做:</p>
<pre><code>for i, z, n in zip(x[1::2], x[0::2], range(1,10)):
icon = IconLeftWidget(icon=f"numeric-{n}-box-multiple-outline"))
listItem = TwoLineIconListItem(text=f"{i}", secondary_text=f"{z}"))
listItem.add_widget(icon)
self.root.ids.todays_workout.add_widget(listItem)
</code></pre>