擅长:python、mysql、java
<p>您可以执行以下操作:</p>
<pre><code>df_tmp = pd.DataFrame([['34', '345'],
['12', '23,534,34'],
['1', '13,42']], columns=['ListID', 'UserIDs'])
s = df_tmp['UserIDs'].str.split(',', expand=True).stack()
i = s.index.get_level_values(0)
df = df_tmp.loc[i].copy()
df["UserID"] = s.values
del df['UserIDs']
</code></pre>