python怎么读取和写入excel表格

import xlwt#设置表格样式def set_style(name,height,bold=False):    style = xlwt.XFStyle()    font = xlwt.Font()    font.name = name    font.bold = bold    font.color_index = 4    font.height = height    style.font = font    return style#写Exceldef write_excel():    f = xlwt.Workbook()    sheet1 = f.add_sheet('学生',cell_overwrite_ok=True)    row0 = ["姓名","年龄","出生日期","爱好"]    colum0 = ["张三","李四","恋习Python","小明","小红","无名"]    #写第一行    for i in range(0,len(row0)):        sheet1.write(0,i,row0[i],set_style('Times New Roman',220,True))    #写第一列    for i in range(0,len(colum0)):        sheet1.write(i+1,0,colum0[i],set_style('Times New Roman',220,True))    sheet1.write(1,3,'2006/12/12')    sheet1.write_merge(6,6,1,3,'未知')#合并行单元格    sheet1.write_merge(1,2,3,3,'打游戏')#合并列单元格    sheet1.write_merge(4,5,3,3,'打篮球')    f.save('test.xls')if __name__ == '__main__':    write_excel()

import xlrdfrom datetime import date,datetimefile = 'test3.xlsx'def read_excel():    wb = xlrd.open_workbook(filename=file)#打开文件    print(wb.sheet_names())#获取所有表格名字    sheet1 = wb.sheet_by_index(0)#通过索引获取表格    sheet2 = wb.sheet_by_name('年级')#通过名字获取表格    print(sheet1,sheet2)    print(sheet1.name,sheet1.nrows,sheet1.ncols)    rows = sheet1.row_values(2)#获取行内容    cols = sheet1.col_values(3)#获取列内容    print(rows)    print(cols)    print(sheet1.cell(1,0).value)#获取表格里的内容，三种方式    print(sheet1.cell_value(1,0))    print(sheet1.row(1)[0].value)