擅长:python、mysql、java
<p>如果可以选择使用熊猫:</p>
<pre><code>import pandas as pd
df = pd.read_csv('filename.csv')
new_column = pd.DataFrame({'new_header': ['new_value_1', 'new_value_2', 'new_value_3']})
df = df.merge(new_column, left_index = True, right_index = True)
df.to_csv('filename.csv', index = False)
</code></pre>