擅长:python、mysql、java
<p>谢谢Shailesh和samy的回复。在函数内部,我使用<code>retvalue = [0,0]</code>来解决“没有足够的值来解包(预期为2,得到0)”错误</p>
<p>文章<a href="https://towardsdatascience.com/apply-and-lambda-usage-in-pandas-b13a1ea037f7" rel="nofollow noreferrer">https://towardsdatascience.com/apply-and-lambda-usage-in-pandas-b13a1ea037f7</a>帮助我在本系列中使用“.apply”,下面是代码</p>
<pre><code>newdf['newwaittime'] = newdf['newid'].apply(lambda x: 0 if x==0 else get_new_wait_time(x))
</code></pre>
<p>我在检查<code>newdf['newid']</code>的值是否为零</p>