擅长:python、mysql、java
<p>您可以使用<a href="https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.apply.html#pandas-series-apply" rel="nofollow noreferrer">^{<cd3>}</a>和<a href="https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.all.html#pandas-series-all" rel="nofollow noreferrer">^{<cd4>}</a>直接应用<code>len</code>函数,而不是<code>lambda</code></p>
<pre class="lang-py prettyprint-override"><code>assert (df.client_id.apply(len) == 12).all(),"Error message"
</code></pre>