参考: https://stackoverflow.com/a/33381246/11842985
duplicated_rows = df[df.index.duplicated(keep=False)]
duplicated_rows.sort_index()参考: https://stackoverflow.com/a/33381246/11842985
duplicated_rows = df[df.index.duplicated(keep=False)]
duplicated_rows.sort_index()このページの著者: takanotume24
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