3
我有一个数据帧,看起来像下面转换数据帧到元组
user item \
0 b80344d063b5ccb3212f76538f3d9e43d87dca9e The Cove - Jack Johnson
1 b80344d063b5ccb3212f76538f3d9e43d87dca9e Entre Dos Aguas - Paco De Lucia
2 b80344d063b5ccb3212f76538f3d9e43d87dca9e Stronger - Kanye West
3 b80344d063b5ccb3212f76538f3d9e43d87dca9e Constellations - Jack Johnson
4 b80344d063b5ccb3212f76538f3d9e43d87dca9e Learn To Fly - Foo Fighters
rating
0 1
1 2
2 1
3 1
4 1
,并希望实现以下结构的列表的词典:
dict-> list of tuples
user-> (item, rating)
b80344d063b5ccb3212f76538f3d9e43d87dca9e -> list((The Cove - Jack
Johnson, 1), ... ,)
我可以这样做:
item_set = dict((user, set(items)) for user, items in \
data.groupby('user')['item'])
但这只能让我半途而废。我如何从groupby中获得相应的“评级”值?
正是我想要的目的。谢谢 –
@OktayGardener没问题。再过几分钟,如果你愿意,你可以[标记我的答案](https://stackoverflow.com/help/someone-answers)。 –