What is the equivalent of a Swift completion block in Python?
<p>In Swift we can write a function with a completion block like this:</p>

<pre><code>func thisNeedsToFinishBeforeWeCanDoTheNextStep(completion: () -&gt; ()) {
    print("The quick brown fox")
    completion()
}
</code></pre>

<p>And then when we call it, we can put something inside of that block to execute once it's finished it's process:</p>

<pre><code>func thisFunctionNeedsToExecuteSecond() {
   print("jumped over the lazy dog")
}
</code></pre>

<p>What is the equivalent in Python?</p>