擅长:python、mysql、java
<p>与权重一起使用<a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.sample.html" rel="nofollow noreferrer">^{<cd1>} function</a>。语法:</p>
<pre><code>#vec = <vector of rows weights>
df.sample(weights = vec)
</code></pre>