import numpy as np
import pandas as pd
import openpyxl

data_df = pd.DataFrame(mean)
data_df.columns = ['A','B','C','D','E','F','G','H','I','J']  #将第一行的0,1,2,...,9变成A,B,C...
data_df.index = ['a','b','c','d','e','f','g','h','i','j']
writer = pd.ExcelWriter('test.xlsx')  # 创建名称为test的excel表格
data_df.to_excel(writer, 'page_1',
float_format='%.2f')  # float_format 精度，将data_df写到test表格的第一页中。若多个文件，可以在page_2中写入
writer.save()  # 保存

#读者可以自己调一调参数，看看结果如何