python - 获取x天前的时间

# 如果是 0 则为今天, 1 为昨天, 以此类推...

def getdate(day):
    today = datetime.datetime.now()
    deviation = datetime.timedelta(days=-day)
    return (today + deviation).strftime('%Y-%m-%d %H:%S:%M')

print(getdate(0))