python pandas dataframe 实现mysql group_contact功能

dict_ = {
          'stu':['a','b','a','b','c'],
          'fav':['fa','fb','faa','fbb','fc']
        }

df_ = pd.DataFrame(dict_)

print(df_)
#输出内容:

# 通过 groupby apply 加lambda实现group_contact

print(df_.groupby('stu').apply(lambda x: ','.join(x.fav)))

当然这样也可以实现:

print(df_.groupby('stu').apply(lambda x: list(x.fav)))
或则:

print(df_.groupby('stu').agg({'fav' : lambda x: ', '.join(x)}))

标签：group,stu,python,fav,dataframe,df,print,groupby,lambda
来源： https://www.cnblogs.com/twain/p/14720760.html