<p>就这么简单:</p>
<pre><code>>>> df[3] = df[3].str[:-1] + ', ' + df['1'] + ')'
>>> df
0 1 2 3
0 746200.0 IP:aWSrjjB foldcauchy foldcauchy(c=3.40, loc=853.32, scale=188436.01, IP:aWSrjjB)
1 1061881.5 IP:joW6uH4 johnsonsu johnsonsu(a=-0.39, b=0.46, loc=715076.10, scale=70401.41, IP:joW6uH4)
2 645000.0 IP:4Q3L2kB foldcauchy foldcauchy(c=3.94, loc=835.77, scale=184545.16, IP:4Q3L2kB)
3 284375.0 IP:WLP1cdn loglaplace loglaplace(c=1.81, loc=-1001.33, scale=701001.33, IP:WLP1cdn)
4 666600.0 IP:kQn348T johnsonsu johnsonsu(a=-0.39, b=0.46, loc=715076.10, scale=70401.41, IP:kQn348T)
5 754678.5 IP:kQn348T loglaplace loglaplace(c=1.93, loc=-1087.33, scale=786087.33, IP:kQn348T)
</code></pre>
<p>参考文献:<br/>
<a href="https://stackoverflow.com/questions/25789445/pandas-make-new-column-from-string-slice-of-another-column">Pandas make new column from string slice of another column</a><br/>
<a href="https://stackoverflow.com/questions/19377969/combine-two-columns-of-text-in-dataframe-in-pandas-python">Combine two columns of text in dataframe in pandas/python</a></p>