pandas ValueError：无法使用多维键建立索引
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ValueError: Cannot index with multidimensional key
提问by Furkan K?l??aslan
I am trying to code a simple recommender system using only pandas and I am having trouble with the filtering part.I want to select all the rows where the RatingCounts column is greater than a value I choose.This returns me a dataframe with one column filled with the correct booleans but i cannot index my data with this selection it gives me a value error as mentioned in the title.Here is the screenshot
我正在尝试仅使用 Pandas 编写一个简单的推荐系统，但我在过滤部分遇到了问题。我想选择 RatingCounts 列大于我选择的值的所有行。这会返回一个数据框，其中一列已填充使用正确的布尔值，但我无法使用此选择索引我的数据，它给了我标题中提到的值错误。这是屏幕截图
回答by unutbu
selectionappears to be a 2D DataFrame with 1 column, RatingCounts.
The error occurs when you pass a 2D indexerto DataFrame.loc.
You can avoid the error by passing a 1D boolean indexer to DataFrame.loc:
selection似乎是一个带有 1 列的 2D DataFrame，RatingCounts. 出现此错误时，你传递一个二维索引到DataFrame.loc。您可以通过将一维布尔索引器传递给 来避免错误DataFrame.loc：
final_data.loc[selection['RatingCounts']]
