删除python pandas.DataFrame 的多重index实例

如下dataframe想要删除多层index

top1000[:10] 

name sex births year prop year sex 1880 F 0 Mary F 7065 1880 0.077643 1 Anna F 2604 1880 0.028618 2 Emma F 2003 1880 0.022013 3 Elizabeth F 1939 1880 0.021309 4 Minnie F 1746 1880 0.019188 5 Margaret F 1578 1880 0.017342 6 Ida F 1472 1880 0.016177 7 Alice F 1414 1880 0.015540 8 Bertha F 1320 1880 0.014507 9 Sarah F 1288 1880 0.014155

top1000.index = top1000.index.droplevel()
top1000.index = top1000.index.droplevel()
top1000[:10]

name sex births year prop 0 Mary F 7065 1880 0.077643 1 Anna F 2604 1880 0.028618 2 Emma F 2003 1880 0.022013 3 Elizabeth F 1939 1880 0.021309 4 Minnie F 1746 1880 0.019188 5 Margaret F 1578 1880 0.017342 6 Ida F 1472 1880 0.016177 7 Alice F 1414 1880 0.015540 8 Bertha F 1320 1880 0.014507 9 Sarah F 1288 1880 0.014155

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