res.groupby(['customer_id'])['project_name'].apply(lambda x:', '.join(x)).reset_index() x.groupby(['sa'])['daList'].apply(lambda x:np.concatenate(list(x))).reset_index() Out[340]: sa daList 0 2 [2, 3] 1 3 [4, 5, 9] 2 5 [44, 55, 23, 45] 3 7 [66] ———————————————— 原文鏈接：https://blog.csdn.net/u011012422/article/details/82773618