您可以使用
to_series,然后转换为
string:
print df# Seasonal#Date #2014-12 -1.089744#2015-01 -0.283654#2015-02 0.158974#2015-03 0.461538print df.index#PeriodIndex(['2014-12', '2015-01', '2015-02', '2015-03'],# dtype='int64', name=u'Date', freq='M')df.index=df.index.to_series().astype(str)print df# Seasonal#Date #2014-12 -1.089744#2015-01 -0.283654#2015-02 0.158974#2015-03 0.461538print df.index#Index([u'2014-12', u'2015-01', u'2015-02', u'2015-03'], dtype='object', name=u'Date')
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