获取昨日日期
oneday = datetime.timedelta(days=1) 一天
day = datetime.datetime.strptime(self.date,'%Y-%m-%d')
day2 = day - oneday
或者
today = datetime.date.today()
yesterday = str(today - datetime.timedelta(days=1))
转载于:https://www.cnblogs.com/phpk/p/10928999.html
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