我用了这个密码
nonzero = ucla_all[ucla_all['ADJUSTMENTS']!= 0]
cond = (nonzero.groupby(['SERV_CODE', 'CPT_CODE']).mean())['ADJUSTMENTS']
cond
显示此表的步骤
SERV_CODE CPT_CODE
2110 90834 -600.000000
90837 -421.000000
2111 90849 -110.000000
90853 -130.000000
2220 90834 -800.000000
90837 -416.534804
90849 -110.000000
如何为第三列编制索引
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