import datetime
now_time = datetime.datetime.now()
yesterday_time = now_time + datetime.timedelta(days=-1)
yesterday_time_nyr = yesterday_time.strftime('%Y%m%d')#格式化输出
……此处省略数据源的读取，直接给出写入文件代码，
将‘新老师’sheet表和‘新同学’sheet表保存到 ‘日报’工作表
df = pd.ExcelWriter('日报'+yesterday_time_nyr+'.xlsx')
teacher.to_excel(bt,'新老师',index=False)
student.to_excel(bt,'新同学',index=False)
原文地址：http://blog.51cto.com/emily18/2048341
