擅长:python、mysql、java
<p>下面是使用<code>np.where</code>的另一种方法:</p>
<pre><code>df['problems'] = np.where(df['problems'].str.len() < 5, '', df['problems'])
print(df)
name location problems
0 Lena Haifa
1 Layla Aman not enough points
2 Dili Istanbul
</code></pre>