如何删除python pandas.DataFrame 的多重index

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如下dataframe想要删除多层index

top1000[:10]

   namesexbirthsyearpropyearsex      1880F0MaryF706518800.0776431AnnaF260418800.0286182EmmaF200318800.0220133ElizabethF193918800.0213094MinnieF174618800.0191885MargaretF157818800.0173426IdaF147218800.0161777AliceF141418800.0155408BerthaF132018800.0145079SarahF128818800.014155

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

 namesexbirthsyearprop0MaryF706518800.0776431AnnaF260418800.0286182EmmaF200318800.0220133ElizabethF193918800.0213094MinnieF174618800.0191885MargaretF157818800.0173426IdaF147218800.0161777AliceF141418800.0155408BerthaF132018800.0145079SarahF128818800.014155




Out[484]:
 namesexbirthsyearprop0MaryF706518800.0776431AnnaF260418800.0286182EmmaF200318800.0220133ElizabethF193918800.0213094MinnieF174618800.0191885MargaretF157818800.0173426IdaF147218800.0161777AliceF141418800.0155408BerthaF132018800.0145079SarahF128818800.014155
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