python中时间转换，获取上一月上一周，本月，本周

def paserTime(timestamp):
    t = time.time()
    f=time.localtime(timestamp/1000)
    print (t)                       #原始时间数据
    # print (int(t))                  #秒级时间戳
    print (int(round(t * 1000)))    #毫秒级时间戳

    #nowTime = lambda: int(round(t * 1000))
  #  print(nowTime());  # 毫秒级时间戳，基于lambda
    nowTime = lambda:timestamp
    str=time.strftime('%Y-%m-%d %H:%M:%S',f)
    print(str)  # 日期格式化

    return str
# paserTime(time.time())
def now2():
    nowTime = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')  # 现在
    print(nowTime)
def nowTime():
    t = time.time()
    f = time.localtime(int(t))
    # print(t)
    str = time.strftime('%Y-%m-%d %H:%M:%S', f)
    print(str)  # 日期格式化
    return str
# nowTime()
def long2Str(longTime):
    f = time.localtime(int(longTime))
    # print(t)
    str = time.strftime('%Y-%m-%d %H:%M:%S', f)
    print(str)  # 日期格式化
    return str
def str2time(str):
    date_time = datetime.datetime.strptime(str, '%Y-%m-%d %H:%M:%S')
    # print(date_time)
    return date_time

def str2timestamp(str):
    timstamp=time.mktime(time.strptime(str, '%Y-%m-%d %H:%M:%S'))
    # print(timstamp)
    return timstamp
    # time.mktime()   与    time.localtime() 互为还原函数。
    # time.mktime(timetuple) ：将时间元组转换成时间戳
    # time.localtime([timestamp])：将时间戳转会为时间元组
# print(str2timestamp(str2)-str2timestamp(str))
def date2datetime(date_param):
    date_str = date_param.strftime('%Y-%m-%d %H:%M:%S')
    date_time = datetime.datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S')
    # print(date_time)
    return date_time
def month():
    first_day=datetime.date.today().replace(day=1).strftime('%Y-%m-%d %H:%M:%S')
    print(first_day)

    _end_time = last_day_of_month(datetime.date.today()).__str__() + ' ' + '23:59:59'
    print(_end_time)

def get_current_week():
    monday, sunday = datetime.date.today(), datetime.date.today()
    one_day = datetime.timedelta(days=1)
    while monday.weekday() != 0:
        monday -= one_day
    while sunday.weekday() != 6:
        sunday += one_day
    monday_datetime = date2datetime(monday)
    sunday_datetime = date2datetime(sunday)
    print(monday_datetime)
    return monday_datetime, sunday_datetime
    # 返回时间字符串
    #  return datetime.datetime.strftime(monday, "%Y/%m/%d") + ' 00:00:00+08:00', datetime.datetime.strftime(sunday, "%Y/%m/%d")+ ' 23:59:59+08:00'


def last_day_of_month(any_day):
    """
    获取获得一个月中的最后一天
    :param any_day: 任意日期
    :return: string
    """
    next_month = any_day.replace(day=28) + datetime.timedelta(days=4)  # this will never fail
    return next_month - datetime.timedelta(days=next_month.day)
# 上月第一天和最后一天
def last_month():
    this_month_start = datetime.datetime(now.year, now.month, 1)
    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_start = {} last_month_end = {}'.format(last_month_start,last_month_end))
    return last_month_start,last_month_end
# 本月第一天和最后一天
def this_month():
    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)
    next_month = now.replace(day=28) + datetime.timedelta(days=4)
    this_month_end = next_month - datetime.timedelta(days=next_month.day)+ datetime.timedelta(
        hours=23, minutes=59, seconds=59)
    print('--- this_month_start = {} this_month_end = {}'.format(this_month_start, this_month_end))
    return this_month_start,this_month_end
# 上周第一天和最后一天
def last_week():
    last_week_start = now - timedelta(days=now.weekday() + 7)
    last_week_end = now - timedelta(days=now.weekday() + 1)+ datetime.timedelta(
        hours=23, minutes=59, seconds=59)
    print('--- last_week_start = {} last_week_end = {}'.format(last_week_start, last_week_end))
    return last_week_start,last_week_end
# 本周第一天和最后一天
def this_week():
    this_week_start = now - timedelta(days=now.weekday())
    this_week_end = now + timedelta(days=6 - now.weekday())+ datetime.timedelta(
        hours=23, minutes=59, seconds=59)
    print('--- this_week_start = {} this_week_end = {}'.format(this_week_start, this_week_end))
    return this_week_start, this_week_end
if __name__=='__main__':
    str='2017-02-28 03:40:10'
    now_time = str2time(str)
    # now_time = datetime.datetime.today()
    now =datetime.datetime(now_time.year, now_time.month, now_time.day)
    # longTime=str2timestamp(str)+60*2
    # long2Str(longTime)
    # now()
    # month()
    # month2()
    # print(get_current_week())
    print(last_day_of_month(now))
    last_month()
    this_month()
    last_week()
    this_week()```


 


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