擅长:python、mysql、java
<p>您可以使用<a href="https://realpython.com/inner-functions-what-are-they-good-for/" rel="nofollow noreferrer">inner function</a>:</p>
<pre><code>def factorial(i):
def recursive_output(i):
if i > 0:
print(i)
recursive_output(i-1)
print("Ready!")
recursive_output(i)
print("Go!")
</code></pre>