df_test=pd.DataFrame( data=np.array([ np.repeat(['class'+str(i+1)foriinrange(2)],10), list(range(10,0,-1))2, list(range(1,11))2 ]).T, columns=['class']+['x'+str(i+1)foriinrange(2)] )np.array强制内部元素格式统一 df_test[df_test.columns.drop(['class'])]=df_test[df_test.columns.drop(['class'])].astype('int32')...