擅长:python、mysql、java
<p>你想得太多了。您希望递归到基本情况,然后在返回时打印行:</p>
<pre><code>def count(num):
if num > 1:
count(num-1)
print("|"*num)
</code></pre>
<p>样本输出:</p>
<pre><code>>>> def count(num):
... if num > 1:
... count(num-1)
... print("|"*num)
...
>>> count(4)
|
||
|||
||||
</code></pre>