擅长:python、mysql、java
<p>使用简单的迭代</p>
<p><strong>例如:</strong></p>
<pre><code>lst = [1,1,1,2,2,2,2,3,3,3,3,3,4,4,4,4,4,4,4,4,4]
dup_check = set()
result = []
for i in lst:
if i not in dup_check:
result.append(i)
dup_check.add(i)
else:
result.append("")
print(result)
</code></pre>
<p><strong>输出:</strong></p>
<pre><code>[1, '', '', 2, '', '', '', 3, '', '', '', '', 4, '', '', '', '', '', '', '', '']
</code></pre>