dateFormat = xlwt.XFStyle()
dateFormat.num_format_str = 'yyyy/mm/dd'
worksheet.write(0, 0, dt.date.today(),dateFormat)
https://my.oschina.net/farces/blog/1605573
dateFormat = xlwt.XFStyle()
dateFormat.num_format_str = 'yyyy/mm/dd'
worksheet.write(0, 0, dt.date.today(),dateFormat)
https://my.oschina.net/farces/blog/1605573