[python]datetime转string、字符串转datetime、日期计算、获取23:59:59时间

骑猪看日落 2022-10-11 10:56 132阅读 0赞

python版本3.9.4  
工具类代码如下

import datetime
    # pip install python-dateutil
    from dateutil.relativedelta import relativedelta
    
    # FORMAT_YYYY_MM_DD = '%Y/%m/%d'
    FORMAT_YYYY_MM_DD_HH_MM_SS = '%Y-%m-%d %H:%M:%S'
    
    
    # 获取当前时间
    def get_current_time():
        return datetime.datetime.now()
    
    
    # 当前时间转字符串
    def get_current_time_str():
        return datetime_to_string(get_current_time())
    
    
    # 时间转字符串
    def datetime_to_string(date_time):
        return date_time.strftime(FORMAT_YYYY_MM_DD_HH_MM_SS)
    
    
    # 时间戳转datetime
    def timestamp_to_datetime(timestamp):
        if not timestamp:
            # 返回当前时间
            return get_current_time()
    
        return datetime.datetime.fromtimestamp(timestamp)
    
    
    # 时间戳转字符串
    def timestamp_to_datetime_str(timestamp):
        date_time = timestamp_to_datetime(timestamp)
        return datetime_to_string(date_time)
    
    
    # 获取指定时间的00:00:00
    def get_datetime_begin(date_time):
        return date_time.replace(date_time.year, date_time.month, date_time.day, 0, 0, 0, 0)
    
    
    # 获取指定时间的23:59:59
    def get_datetime_end(date_time):
        return date_time.replace(date_time.year, date_time.month, date_time.day, 23, 59, 59, 999999)
    
    
    # 获取指定日期下一月的时间
    def get_next_month_datetime(date_time):
        return date_time.today() - relativedelta(months=-1)
    
    
    # 指定时间前{#days}时间
    def get_next_datetime(date_time, days):
        return date_time - relativedelta(days=days)
    
    
    # 获取指定时间当月第一天00：00：00
    def get_month_datetime_begin(date_time):
        return date_time.replace(date_time.year, date_time.month, 1, 0, 0, 0, 0)
    
    
    # 获取指定时间当月最后一天23：59：59
    def get_month_datetime_end(date_time):
        next_month = date_time.replace(date_time.year, date_time.month, 28, 23, 59, 59, 999999) + datetime.timedelta(days=4)
        return next_month - datetime.timedelta(days=next_month.day)
    
    
    # 获取指定时间下一个天的时间
    def get_next_day_datetime(date_time):
        return date_time + datetime.timedelta(days=1)
    
    
    # 获取指定时间下一小时的时间
    def get_next_hour_datetime(date_time):
        return date_time + datetime.timedelta(hours=1)
    
    
    # 比较时间大小
    def compare_time(date_time1, date_time2):
        date_time1 = date_time1.replace()
        date_time2 = date_time2.replace()
        return date_time1 > date_time2