擅长:python、mysql、java
<p><a href="https://pandas.pydata.org/pandas-docs/stable/" rel="nofollow noreferrer">^{<cd1>}</a>库非常适合:</p>
<pre><code>In [274]: mylist=['in','out','out','in']
In [275]: df = pd.read_csv('my.csv', sep=',', header=None)
In [276]: df['new_col'] = mylist
In [277]: df.to_csv('my.csv', sep=',', index=None, header=False)
</code></pre>
<p>最终csv文件内容:</p>
<pre><code>rizwan,10,in
arsalan,30,out
ali,40,out
suffiyan,60,in
</code></pre>