import pandas as pd
index=[[2010,2011,2012,2010,2011,2012],['期中','期中','期中','期末','期末','期末']]
index = pd.MultiIndex.from_arrays...import pandas as pd
index=[['期中','期末'],[2010,2011,2012],['A','B']]
index = pd.MultiIndex.from_product...#查询分数列
import pandas as pd
index=[['期中','期末'],[2010,2011,2012],['A','B']]
index = pd.MultiIndex.from_product...import pandas as pd
index=[['期中','期末'],[2010,2011,2012],['A','B']]
index = pd.MultiIndex.from_product...import pandas as pd
index=[['期中','期末'],[2010,2011,2012],['A','B']]
index = pd.MultiIndex.from_product