用python写的某个月的第一天和最后一天

用python写的某个月的第一天和最后一天

# -*- coding: utf-8 -*-# 脚本使用规则 带参数的时候 如下所示 可以统计某个月的时间# python contractor_salescount_per_month.py 2016-09import sysimport MySQLdbimport datetimeimport osimport timedef get_now_time():    return time.strftime("%Y-%m-%d",time.localtime(time.time()))def get_ago_time(add_day):     now = datetime.datetime.now()    delta = datetime.timedelta(days = add_day)    n_days = now + delta    mon_ago_temp = n_days.strftime('%Y-%m-%d')    return mon_ago_tempdef get_need_day(): #获取上个月的第一天和最后一天    now_time = get_now_time()    now_time_list = now_time.split("-")    count = 1    while 1:        count_time = (count)*(-1)        last_day_mon_ago = get_ago_time(count_time)        last_day_mon_ago_list = last_day_mon_ago.split("-")        if now_time_list[1] != last_day_mon_ago_list[1]:            first_day_month_ago = last_day_mon_ago_list[0] +"-"+ last_day_mon_ago_list[1] + "-1"            return first_day_month_ago, last_day_mon_ago        count = count + 1def get_need_day_one_month(month_list = []): #获取指定月份的第一天和最后一天    now_time = get_now_time()    now_time_list = now_time.split("-")    count = 1    while 1:        count_time = (count)*(-1)        last_day_mon_ago = get_ago_time(count_time)        last_day_mon_ago_list = last_day_mon_ago.split("-")        if int(month_list[0]) == int(last_day_mon_ago_list[0]) and int(month_list[1]) == int(last_day_mon_ago_list[1]):            first_day_month_ago = last_day_mon_ago_list[0] +"-"+ last_day_mon_ago_list[1] + "-1"            return first_day_month_ago, last_day_mon_ago        count = count + 1if  __name__ =="__main__":        reload(sys)    sys.setdefaultencoding('utf-8')    # 根据参数情况来获取统计时间    try:            if sys.argv[1]:                                               print "sys.argv[1]---------",sys.argv[1] , type(sys.argv[1])            month_str = sys.argv[1]            month_list = month_str.split("-")            month_ago_first_day = get_need_day_one_month(month_list)[0]            month_ago_last_day = get_need_day_one_month(month_list)[1]                        last_month = month_str    except Exception as e:        month_ago_first_day = get_need_day()[0]        month_ago_last_day = get_need_day()[1]        last_month_list = get_need_day()[0].split("-")        last_month = last_month_list[0] + "-" + last_month_list[1]   print "last_month == ", last_month, month_ago_first_day, month_ago_last_day