end_time = datetime.date.today() year = end_time.strftime("%Y") month = end_time.strftime("%m") day = end_time.strftime("%d") params = { "year": year, "month": month, "day": day, "current_date": f"{year}-{month}-{day}" return params def get_current_week(): :return: start_time, end_time = datetime.date.today(), datetime.date.today() one_day = datetime.timedelta(days=1) while start_time.weekday() != 0: start_time -= one_day while end_time.weekday() != 6: end_time += one_day start_year = start_time.strftime("%Y") start_month = start_time.strftime("%m") start_day = start_time.strftime("%d") year = end_time.strftime("%Y") month = end_time.strftime("%m") end_day = end_time.strftime("%d") params = { "start_year": start_year, # 开始年份 "start_month": start_month, # 开始月份 "start_day": start_day, # 开始日期 "start_date": f"{start_year}-{start_month}-{start_day}", # 开始日期 "end_year": year, # 结束年份 "end_month": month, # 结束月份 "end_day": end_day, # 结束日期 "end_date": f"{year}-{month}-{end_day}" # 结束日期 return params def get_current_month(): 当前时间的月份首日与最后一天 :return: today = datetime.date.today() year, month = today.year, today.month end = datetime.datetime(year, month + 1, 1) - datetime.timedelta(days=1) params = { "year": year, "month": month, "start_day": "01", "start_date": f"{year}-{month}-01", "end_day": f"{end.day}", "end_date": f"{year}-{month}-{end.day}", return params def get_last_day(): :return: d = datetime.date.today() one_day = datetime.timedelta(days=1) end_time = d - one_day year = end_time.strftime("%Y") month = end_time.strftime("%m") day = end_time.strftime("%d") params = { "year": year, "month": month, "day": day, "last_date": f"{year}-{month}-{day}" return params def get_last_week(): :return: d = datetime.date.today() days_count = datetime.timedelta(days=d.isoweekday()) end_time = d - days_count six_days = datetime.timedelta(days=6) start_time = end_time - six_days start_year = start_time.strftime("%Y") start_month = start_time.strftime("%m") start_day = start_time.strftime("%d") year = end_time.strftime("%Y") month = end_time.strftime("%m") end_day = end_time.strftime("%d") params = { "start_year": start_year, "start_month": start_month, "start_day": start_day, "start_date": f"{start_year}-{start_month}-{start_day}", "year": year, "month": month, "end_day": end_day, "end_date": f"{year}-{month}-{end_day}", return params def get_last_month(): d = datetime.date.today() days_count = datetime.timedelta(days=d.day) end_time = d - days_count year = end_time.strftime("%Y") month = end_time.strftime("%m") params = { "year": year, "month": month, "start_day": "01", "start_date": f"{year}-{month}-01", "end_day": f"{end_time.day}", "end_date": f"{year}-{month}-{end_time.day}", return params if __name__ == '__main__': print('当日', get_current_day()) print('当周', get_current_week()) print('当月', get_current_month()) print('昨日', get_last_day()) print('上周', get_last_week()) print('上月', get_last_month())

获取当前月、上一个月、下一个月、月份第一天、月份最后一天

import calendar
from datetime import datetime
from dateutil.relativedelta import relativedelta
class DateTimeUtil():
    def get_cur_month(self):
        # 获取当前月
        return datetime.now().strftime("%Y-%m")
    def get_last_month(self, number=1):
        # 获取前几个月
        month_date = datetime.now().date() - relativedelta(months=number)
        return month_date.strftime("%Y-%m")
    def get_next_month(self, number=1):
        # 获取后几个月
        month_date = datetime.now().date() + relativedelta(months=number)
        return month_date.strftime("%Y-%m")
    def get_cur_month_start(self):
        # 获取当前月的第一天
        month_str = datetime.now().strftime('%Y-%m')
        return '{}-01'.format(month_str)
    def get_cur_month_end(self):
        # 获取当前月的最后一天
        param: month_str 月份，2021-04
        # return: 格式 %Y-%m-%d
        month_str = datetime.now().strftime('%Y-%m')
        year, month = int(month_str.split('-')[0]), int(month_str.split('-')[1])
        end = calendar.monthrange(year, month)[1]
        return '{}-{}-{}'.format(year, month, end)
    def get_last_month_start(self, month_str=None):
        # 获取上一个月的第一天
        param: month_str 月份，2021-04
        # return: 格式 %Y-%m-%d
        if not month_str:
            month_str = datetime.now().strftime('%Y-%m')
        year, month = int(month_str.split('-')[0]), int(month_str.split('-')[1])
        if month == 1:
            year -= 1
            month = 12
        else:
            month -= 1
        return '{}-{}-01'.format(year, month)
    def get_next_month_start(self, month_str=None):
        # 获取下一个月的第一天
        param: month_str 月份，2021-04
        # return: 格式 %Y-%m-%d
        if not month_str:
            month_str = datetime.now().strftime('%Y-%m')
        year, month = int(month_str.split('-')[0]), int(month_str.split('-')[1])
        if month == 12:
            year += 1
            month = 1
        else:
            month += 1
        return '{}-{}-01'.format(year, month)
    def get_last_month_end(self, month_str=None):
        # 获取上一个月的最后一天
        param: month_str 月份，2021-04
        # return: 格式 %Y-%m-%d
        if not month_str:
            month_str = datetime.now().strftime('%Y-%m')
        year, month = int(month_str.split('-')[0]), int(month_str.split('-')[1])
        if month == 1:
            year -= 1
            month = 12
        else:
            month -= 1
        end = calendar.monthrange(year, month)[1]
        return '{}-{}-{}'.format(year, month, end)
    def get_next_month_end(self, month_str=None):
        # 获取下一个月的最后一天
        param: month_str 月份，2021-04
        # return: 格式 %Y-%m-%d
        if not month_str:
            month_str = datetime.now().strftime('%Y-%m')
        year, month = int(month_str.split('-')[0]), int(month_str.split('-')[1])
        if month == 12:
            year += 1
            month = 1
        else:
            month += 1
        end = calendar.monthrange(year, month)[1]
        return '{}-{}-{}'.format(year, month, end)
if __name__ == '__main__':
    # 获取当前月
    print('当前月', DateTimeUtil().get_cur_month())
    # 获取上一个月
    print('上一个月', DateTimeUtil().get_last_month())
    # 获取上两个月
    print('上两个月', DateTimeUtil().get_last_month(number=2))
    # 获取下一个月
    print('下一个月', DateTimeUtil().get_next_month())
    # 获取下两个月
    print('下两个月', DateTimeUtil().get_next_month(number=2))
    # 获取当前月的第一天
    print('当前月的第一天', DateTimeUtil().get_cur_month_start())
    # 获取当前月的最后一天
    print('当前月的最后一天', DateTimeUtil().get_cur_month_end())
    # 获取上个月的第一天
    print('上个月的第一天', DateTimeUtil().get_last_month_start())
    # 获取下个月的第一天
    print('下个月的第一天', DateTimeUtil().get_next_month_start())
    # 获取上个月的最后一天
    print('上个月的最后一天', DateTimeUtil().get_last_month_end())
    # 获取下个月的最后一天
    print('下个月的最后一天', DateTimeUtil().get_next_month_end())
输出：
当前月 2021-04
上一个月 2021-03
上两个月 2021-02
下一个月 2021-05
下两个月 2021-06
当前月的第一天 2021-04-01
当前月的最后一天 2021-4-30
上个月的第一天 2021-3-01
下个月的第一天 2021-5-01
上个月的最后一天 2021-3-31
下个月的最后一天 2021-5-31