在组内的多索引数据框中对聚合列进行排序

Question

从数据here中汲取灵感，我们获得了以下系列/数据框

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df = data.groupby(["Manufacturer","Product Name","Product Launch Data"]).sum("total")

我们如何在 total Manufacturer Product Name Product Launch Date Apple iPad 2010-04-03 30 iPod 2001-10-23 34 Samsung Galaxy 2009-04-27 24 Galaxy Tab 2010-09-02 22 之后排序，同时仍然保留组，即以：pp结尾

total

Answer 1

在最新的熊猫版本中，可以按级别和列名称进行排序，因此可以在这里工作：

df = df.sort_values(['Manufacturer','total'])
print (df)
                                               total
Manufacturer Product Name Product Launch Date       
Apple        iPad         2010-04-03              30
             iPod         2001-10-23              34
Samsung      Galaxy Tab   2010-09-02              22
             Galaxy       2009-04-27              24