# 当前季度
now_quarter = now.month / 3 if now.month % 3 == 0 else now.month / 3 + 1
print('--- now_quarter = {}'.format(now_quarter))
# 本周第一天和最后一天
this_week_start = now - timedelta(days=now.weekday())
this_week_end = now + timedelta(days=6 - now.weekday())
print('--- this_week_start = {} this_week_end = {}'.format(this_week_start, this_week_end))
# 上周第一天和最后一天
last_week_start = now - timedelta(days=now.weekday() + 7)
last_week_end = now - timedelta(days=now.weekday() + 1)
print('--- last_week_start = {} last_week_end = {}'.format(last_week_start, last_week_end))
# 本月第一天和最后一天
this_month_start = datetime.datetime(now.year, now.month, 1)
this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1)
print('--- this_month_start = {} this_month_end = {}'.format(this_month_start, this_month_end))
# 上月第一天和最后一天
last_month_end = this_month_start - timedelta(days=1)
last_month_start = datetime.datetime(last_month_end.year, last_month_end.month, 1)
print('--- last_month_end = {} last_month_start = {}'.format(last_month_end, last_month_start))
# 本季第一天和最后一天
month = (now.month - 1) - (now.month - 1) % 3 + 1
this_quarter_start = datetime.datetime(now.year, month, 1)
this_quarter_end = datetime.datetime(now.year, month + 3, 1) - timedelta(days=1)
print('--- this_quarter_start = {} this_quarter_end = {}'.format(this_quarter_start, this_quarter_end))
# 上季第一天和最后一天
last_quarter_end = this_quarter_start - timedelta(days=1)
last_quarter_start = datetime.datetime(last_quarter_end.year, last_quarter_end.month - 2, 1)
print('--- last_quarter_start = {} last_quarter_end = {}'.format(last_quarter_start, last_quarter_end))
# 本年第一天和最后一天
this_year_start = datetime.datetime(now.year, 1, 1)
this_year_end = datetime.datetime(now.year + 1, 1, 1) - timedelta(days=1)
print('--- this_year_start = {} this_year_end = {}'.format(this_year_start, this_year_end))
# 去年第一天和最后一天
last_year_end = this_year_start - timedelta(days=1)
last_year_start = datetime.datetime(last_year_end.year, 1, 1)
print('--- last_year_start = {} last_year_end = {}'.format(last_year_start, last_year_end))
import datetimefrom datetime import timedeltanow = datetime.datetime.now()# 今天today = nowprint('--- today = {}'.format(today))# 昨天yesterday = now - timedelta(days=1)print('--- yesterday =...
书写一个函数爬取整个数据库的文件，主要是通过每周的定时爬取
为了凸显每周定时爬取，需要
获取
上周
的时间节点
之前写过类似的时间格式函数：
Python
关于strftime函数详细解析 附实战代码
主要的包为：import datetime
1. 基本函数
对于datetime
获取
这些功能函数，需要了解一些基本函数
Date date = new Date();//获得系统时间.
SimpleDateFormat sdf = new SimpleDateFormat(" yyyy-MM-dd HH:mm:ss");
String nowTime = sdf.format(date);
Date time = sdf.parse(nowTime);
2、
获取
昨天时间（年月日时分秒）
Date dN.
public static String getLastWeekMonday(String time) {
SimpleDateFormat foramt = new SimpleDateFormat("yyyy-MM-dd");
Date date = null;
try {
date = foramt.parse(time);
} catch (P.
export function getThisWeekData() {//获得本周周一~周日的年月日
var thisweek = {};
var date = new Date();
// 本周一的
日期
date.setDate(date.getDate() - date.getDay() + 1);
thisweek....
SUBSTR(FROM_UNIXTIME(UNIX_TIMESTAMP()),1,10) ,--out 2021-09-08 执行代码
日期
，当日
日期
concat(SUBSTR(DATE_SUB(FROM_UNIXTIME(UNIX_TIMESTAMP()),DAY(FROM_UNIXTIME(UNIX_TIMESTAMP()))),1,7) ,'-01'), --out 2021-08-01 上月月初
DATE_SUB(FROM_UNIXTIME(UNIX_TIMESTAMP(.
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = sdf.parse("2021-02-02");
Calendar calendar = Calendar.getInstance();
calendar....
package com.goldcn.jzgmanageplat.b2b.controller;
import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;
import com.goldcn.common.utils....
#
获取
当月
最后
一天
last_day = first_day.replace(month=first_day.month+1, day=1) - datetime.timedelta(days=1)
print("当月
第一天
：", first_day)
print("当月
最后
一天
：", last_day)
输出结果如下：
当月
第一天
： 2022-01-01
当月
最后
一天
： 2022-01-31
