def generate_excel(excel_name, title_list, properties, data):

     """

     生成指定的excel文件，并返回文件的路径，文件保存在static/files/excels下，并自动追加时间戳

     :param excel_name: 文件名, 注意不要带文件类型后缀

     :param title_list: 标题

     :param properties: 对应的属性名，方法按照".property_name"的方式获取值

     :param data: 数据，建议为query_set

     :return: 生成文件的全路径

     """

     now = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")

     workbook = xlsxwriter.Workbook("{}/{}{}.xlsx".format(EXCEL_DIR, excel_name, now))

     worksheet = workbook.add_worksheet(excel_name)

     worksheet.set_first_sheet()

     for i in range(len(title_list)):

         worksheet.set_column('{}:{}'.format(chr(65 + i), chr(66 + i)), 20)

     excel_format = workbook.add_format()

     excel_format.set_border(1)

     excel_format.set_align('center')

     excel_format.set_text_wrap()

     format_title = workbook.add_format()

     format_title.set_border(1)

     format_title.set_bg_color('#cccccc')

     format_title.set_align('center')

     format_title.set_bold()

     # 表头

     worksheet.write_row('A1', title_list, format_title)

     i = 2

     for datum in data:

         location = 'A' + str(i)

         worksheet.write_row(location, [eval("datum.{}".format(key)) for key in properties], excel_format)

         i += 1

     workbook.close()

     file_path = "{}/{}{}.xlsx".format(EXCEL_DIR, excel_name, now)

     if file_path:

         os.chmod(file_path, 0777)

     return file_path