擅长:python、mysql、java
<p>像这样使用<a href="https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.insert.html" rel="nofollow noreferrer">^{<cd1>}</a>:</p>
<pre><code>for col in TemplateColumns:
if col not in df:
df.insert(1, col, np.nan)
</code></pre>