这似乎起作用：
import pandas as pddata = {'a': [1,2,3,4], 'b': [10,20,30,40],'c': [100,200,300,400]}df = pd.concat({"Estimates": pd.Dataframe(data)}, axis=1, names=["l1", "l2"])l1 Estimates l2 a b c01 10 10012 20 20023 30 30034 40 400
