Python实现日期判断和加减操作详解

python实现日期判断和加减操作

#====================================================
#时间相关
#====================================================
 
def if_workday(day_str, separator=""):
    """
    if a day is workday
    
    :param day_str: string of a day
    :param separator: separator of year, month and day, default is empty
    :return: true: is workday; false: not workday
    """
    spec = "%y" + separator + "%m" + separator + "%d"
    day = datetime.strptime(day_str, spec).date()
    # monday == 0 ... sunday == 6
    if day.weekday() in [0, 1, 2, 3, 4]:
        return true
    else:
        return false
 
def if_weekend(day_str, separator=""):
    """
    if a day is weekend
    
    :param day_str: string of a day
    :param separator: separator of year, month and day, default is empty
    :return: true: is weekend; false: not weekend
    """
    spec = "%y" + separator + "%m" + separator + "%d"
    day = datetime.strptime(day_str, spec).date()
    # monday == 0 ... sunday == 6
    if day.weekday() in [5, 6]:
        return true
    else:
        return false
 
def is_week_lastday():
    '''
    判断今天是否为周末，return the day of the week as an integer,monday is 0 and sunday is 6
    
    :return:
    '''
    
    now = (datetime.datetime.utcnow() + datetime.timedelta(hours=8))
    # 假如今天是周日
    todayindex = now.weekday()
    # 如果今天是周日，则返回true
    if todayindex == 6:
        print("todayindex={},今天是周末...".format(todayindex))
        return true
    else:
        print("todayindex={},今天是周 {}，不是周末...".format(todayindex,int(todayindex+1)))
        return false
    
def is_week_whichday(dayindex=6):
    '''
    判断今天一周的哪一天，周一为0，周末为6，return the day of the week as an integer,monday is 0 and sunday is 6
    
    :return:
    '''
    
    now = (datetime.datetime.utcnow() + datetime.timedelta(hours=8))
    # 假如今天是周日
    todayindex = now.weekday()
    # 如果今天是周日，则返回true
    if todayindex == dayindex:
        print("todayindex={},今天是周 {}，不是周 {}...".format(todayindex, int(todayindex+1),int(dayindex+1)))
        return true
    else:
        print("todayindex={},今天是周 {}，不是周 {}...".format(todayindex,int(todayindex+1),int(dayindex+1)))
        return false
 
def is_month_lastday():
    '''
    # 判断今天是否为月末
    
    :return:
    '''
    
    # 获得当月1号的日期
    start_date = datetime.date.today().replace(day=1)
    # 获得当月一共有多少天（也就是最后一天的日期）
    _, days_in_month = calendar.monthrange(start_date.year, start_date.month)
 
    todayindex = time.strftime("%d", time.localtime())
    
    # 如果今天是周末，返回true
    if int(todayindex) == int(days_in_month):
        print("start_date={},todayindex={},days_in_month={},今天是月末...".format(start_date,todayindex, days_in_month))
        return true
    else:
        print("start_date={},todayindex={},days_in_month={},今天不是月末...".format(start_date,todayindex , days_in_month))
        return false
 
def get_this_week_start():
    '''
    获取本周第一天日期
    
    :return:
    '''
    now = datetime.datetime.now()
    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))
    print('--- this_week_start = {} '.format(this_week_start))
    return this_week_start
    
def get_this_week_end():
    '''
    # 获取本周最后一天日期
    
    :return:
    '''
    
    now = datetime.datetime.now()
    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))
    print('--- this_week_end = {}'.format(this_week_end))
    return this_week_end
 
def get_last_month_start(now = datetime.datetime.now()):
    
    now = datetime.datetime.strptime(now, "%y-%m-%d")
    # 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) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    # 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)+ datetime.timedelta(hours=23, minutes=59, seconds=59)
    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))
    print('--- last_month_start = {}'.format(last_month_start))
    return last_month_start
 
def get_last_month_end(now = datetime.datetime.now()):
    now = datetime.datetime.strptime(now, "%y-%m-%d")
    # 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) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    # 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) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    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))
    print('--- last_month_end = {} '.format(last_month_end))
    return last_month_end
 
def get_this_month_start(now = datetime.datetime.now()):
    now = datetime.datetime.strptime(now, "%y-%m-%d")
    # 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) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    # 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) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    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))
    print('--- this_month_start = {} '.format(this_month_start))
    return this_month_start
 
def get_this_month_end(now = datetime.datetime.now()):
    now=datetime.datetime.strptime(now, "%y-%m-%d")
    # 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) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    
    if now.month < 12:
        this_month_end = datetime.datetime(now.year, now.month + 1, 1) - timedelta(days=1) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    elif  now.month >= 12:
        this_month_end = datetime.datetime(now.year, now.month , now.day+30) + datetime.timedelta(hours=23, minutes=59, seconds=59)
 
        
    # 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) + datetime.timedelta(hours=23, minutes=59, seconds=59)
    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))
    # print('--- this_month_end = {} '.format(this_month_end))
    return str(this_month_end)
 
#从一个时间段获取其中的每一天,可以自定义时间间隔
def get_every_day(start = '2018-01-01',end = '2021-01-01',dayscount=1):
    '''
    从一个时间段获取其中的每一天,可以自定义时间间隔
    
    :param start: str类型，开始时间，如：'2018-01-01'
    :param end: str类型，结束时间，如：'2021-01-01'
    :param dayscount: int类型，每一个时间间隔，默认为1天
    :return:
    '''
    datestart = datetime.datetime.strptime(start, '%y-%m-%d')
    dateend = datetime.datetime.strptime(end, '%y-%m-%d')
    
    date_list=[]
    while datestart < dateend:
        datestart += datetime.timedelta(days=dayscount)
        date_str=str(datestart.strftime('%y-%m-%d'))
        # print('date_str={}'.format(date_str))
        date_list.append(date_str)
 
    print('date_list={}'.format(date_list))
    return date_list
 
#从一个时间段获取其中的每一月,可以自定义时间间隔
def getbetweeneverymonth(begin_date,end_date):
    date_list = []
    begin_date = datetime.datetime.strptime(begin_date, "%y-%m-%d")
    end_date = datetime.datetime.strptime(end_date, "%y-%m-%d")
    # end_date = datetime.datetime.strptime(time.strftime('%y-%m-%d', time.localtime(time.time())), "%y-%m-%d")
    while begin_date <= end_date:
        date_str = begin_date.strftime("%y-%m-%d")
        begin_date = add_months_start(begin_date, 1)
        date_end=get_this_month_end(date_str)
        date_list.append((date_str+' 00:00:00',date_end))
        
    print('date_list={}'.format(date_list))
    return date_list
 
 
def add_months_start(dt, months):
    month = int(dt.month - 1 + months)
    year = int(dt.year + month / 12)
    month = int(month % 12 + 1)
    day = min(dt.day, calendar.monthrange(year, month)[1])
    return dt.replace(year=year, month=month, day=day)
 
def add_months_end(dt, months):
    month = int(dt.month - 1 + months)
    year = int(dt.year + month / 12)
    month = int(month % 12 + 1)
    day = max(dt.day, calendar.monthrange(year, month)[1])
    return dt.replace(year=year, month=month, day=day)

到此这篇关于python实现日期判断和加减操作详解的文章就介绍到这了,更多相关python日期判断 加减操作内容请搜索以前的文章或继续浏览下面的相关文章希望大家以后多多支持！