В каком формате (виде) должны быть обучающие данные для keras

(x_train, y_train), (x_test, y_test) = boston_housing.load_data(factors,resolve)

from keras.datasets import boston_housing
from keras.models import Sequential
from keras.layers import Dense
import openpyxl
import numpy as np
 
#Для начала загрузим библиотеку и выберем нужную книгу и рабочий лист:
wb = openpyxl.load_workbook(filename = 'E:/Fast_Water_project/Gidrolodge_.xlsx')
sheet_oren = wb['Onb']
 
def Not_None (x):
    if x!=None:
        return x
    else:
        return 0
    
#считываем заданный диапазон
factor_days = [Not_None(v[0].value) for v in sheet_oren['E2':'E1126']]
factor_osadky = [Not_None(v[0].value) for v in sheet_oren['F2':'F1126']]
factor_level_snow = [Not_None(v[0].value) for v in sheet_oren['G2':'G1126']]
factor_chandge_lvl_snow = [Not_None(v[0].value) for v in sheet_oren['H2':'H1126']]
factor_reserv_water = [Not_None(v[0].value) for v in sheet_oren['I2':'I1126']]
factor_frez_ground = [Not_None(v[0].value) for v in sheet_oren['J2':'J1126']]
factor_ice = [Not_None(v[0].value) for v in sheet_oren['K2':'K1126']]
factor_max_t = [Not_None(v[0].value) for v in sheet_oren['L2':'L1126']]
factor_min_t = [Not_None(v[0].value) for v in sheet_oren['M2':'M1126']]
factor_humidity = [Not_None(v[0].value) for v in sheet_oren['N2':'N1126']]
factor_deficit_humidity = [Not_None(v[0].value) for v in sheet_oren['O2':'O1126']]
factor_solar = [Not_None(v[0].value) for v in sheet_oren['P2':'P1126']]
factor_level_water = [Not_None(v[0].value) for v in sheet_oren['Q2':'Q1126']]
resolve_chandge_lvl_water = [Not_None(v[0].value) for v in sheet_oren['R2':'R1126']]
 
factors_list=list()
resolve_list=list()
factors_list.append(factor_days)
factors_list.append(factor_osadky)
factors_list.append(factor_level_snow)
factors_list.append(factor_chandge_lvl_snow)
factors_list.append(factor_reserv_water)
factors_list.append(factor_frez_ground)
factors_list.append(factor_ice)
factors_list.append(factor_max_t)
factors_list.append(factor_min_t)
factors_list.append(factor_humidity)
factors_list.append(factor_deficit_humidity)
factors_list.append(factor_solar)
factors_list.append(factor_level_water)
resolve_list=[x for x in resolve_chandge_lvl_water]
 
factors=np.array(factors_list)
resolve=np.array(resolve_list)
 
#(x_train, y_train), (x_test, y_test) = boston_housing.load_data(factors,resolve)
 
#Нормализация данных
#Вычитаем среднее значение и делим на стандартное отклонение
# Среднее значение
mean = x_train.mean(axis=0)
 Стандартное отклонение
 std = x_train.std(axis=0)
 x_train -= mean
 x_train /= std
 x_test -= mean
 x_test /= std