比较2个时刻日期字串的时间差
一、背景
有时需要比较2个时刻日期字串的时间差
'2009-02-28 00:00:04'
'2010-03-01 01:02:03'
时间差为
1年0个月6天 1个小时1分钟59秒
二、分析
采用python,
编写比较函数:gap_start2end('2009-02-28 00:00:04','2010-03-01 01:02:03')
返回时间差的组合表示数:((1, 0, 6), (1, 1, 59))
三、封装好的函数方法
import time import datetime import math # 一、相同日期格式的时间距离 def date2obj(date_str='2015-04-07 19:11:21', format='%Y-%m-%d %H:%M:%S'): ''' 日期字串 转 日期对象 :param date_str:日期字串 :param format:日期字串格式 :return:日期对象 d_obj.year 输出 2015 d_obj.month 输出 4 d_obj.day 输出 7 ''' t_str = date_str d_obj = datetime.datetime.strptime(t_str, format) return d_obj # 1、s秒时间间隔 def time_seconds_span(start_date1, end_date2, fomart1='%Y-%m-%d %H:%M:%S', fomart2='%Y-%m-%d %H:%M:%S'): d1_obj = date2obj(start_date1, fomart1) d2_obj = date2obj(end_date2, fomart2) return (d2_obj - d1_obj).seconds # 2、min分钟时间间隔 def time_minutes_span(start_date1, end_date2, fomart1='%Y-%m-%d %H:%M:%S', fomart2='%Y-%m-%d %H:%M:%S'): d1_obj = date2obj(start_date1, fomart1) d2_obj = date2obj(end_date2, fomart2) seconds_span = (d2_obj - d1_obj).seconds # 向下取整 mins_span = math.floor(seconds_span / 60) return mins_span # 3、h小时时间间隔 def time_hours_span(start_date1, end_date2, fomart1='%Y-%m-%d %H:%M:%S', fomart2='%Y-%m-%d %H:%M:%S'): d1_obj = date2obj(start_date1, fomart1) d2_obj = date2obj(end_date2, fomart2) seconds_span = (d2_obj - d1_obj).seconds # 向下取整 hours_span = math.floor(seconds_span / (60 * 60)) return hours_span # 4、d天数时间间隔。无论是否带有h、min、s,计算时,会忽略h、min、s,只计算天数、月数和年数。 def date_days_span(start_date1, end_date2, fomart1='%Y-%m-%d', fomart2='%Y-%m-%d'): d1_obj = date2obj(start_date1, fomart1) d2_obj = date2obj(end_date2, fomart2) # 只取天数差值。等同于向下取整。 days_span = (d2_obj - d1_obj).days return days_span # 5、month月数时间间隔。无论是否带有h、min、s,计算时,会忽略h、min、s,只计算天数、月数和年数。 def date_months_span(start_date1, end_date2, fomart1='%Y-%m-%d', fomart2='%Y-%m-%d'): d1_obj = date2obj(start_date1, fomart1) d2_obj = date2obj(end_date2, fomart2) # 向下取整。只取天数。 days_span = (d2_obj - d1_obj).days months_span = math.floor(days_span / 30) return months_span # 6、year年数时间间隔。无论是否带有h、min、s,计算时,会忽略h、min、s,只计算天数、月数和年数。 def date_years_span(start_date1, end_date2, fomart1='%Y-%m-%d', fomart2='%Y-%m-%d'): d1_obj = date2obj(start_date1, fomart1) d2_obj = date2obj(end_date2, fomart2) # 向下取整。只取天数。 days_span = (d2_obj - d1_obj).days years_span = math.floor(days_span / (12 * 30)) return years_span def gap_start2end(start_str, end_str, start_fomart='%Y-%m-%d %H:%M:%S', end_fomart='%Y-%m-%d %H:%M:%S'): ''' 比较两个时刻的时间差 :param start_str: 起始时刻日期字串 :param end_str: 截止时刻日期字串 :param start_fomart: 起始时刻日期字串读取格式 :param end_fomart: 截止时刻日期字串读取格式 :return: 时刻差值组合数的数组((y, m, d), (h, min, sec)) # 举例说明: '2009-02-28 00:00:04' , '2010-03-01 01:02:03' 输出((1, 0, 6), (1, 1, 59)) 含义为:时间间隔1年0个月6天,1小时1分钟59秒 # 时间回推说明: # sum_days = y * 30 * 12 + m * 30 + d # sum_seconds = sum_days * 24 * 60 * 60 + h * 60 * 60 + min * 60 + sec ''' # 年数差 years_gap = date_years_span(start_str, end_str, start_fomart, end_fomart) # 月数差 months_gap = date_months_span(start_str, end_str, start_fomart, end_fomart) # 天数差 days_gap = date_days_span(start_str, end_str, start_fomart, end_fomart) # 取出日期的组合表示数 y = years_gap m = months_gap % 12 d = days_gap % 30 # 小时数差 hours_gap = time_hours_span(start_str, end_str, start_fomart, end_fomart) # 分钟数差 mins_gap = time_minutes_span(start_str, end_str, start_fomart, end_fomart) # 秒数差 seconds_gap = time_seconds_span(start_str, end_str, start_fomart, end_fomart) # 取出时间的组合表示数 h = hours_gap min = mins_gap % 60 sec = seconds_gap % 60 return ((y, m, d), (h, min, sec)) if __name__ == '__main__': # # 1、计算秒差。 # start_date1 = '2015-04-07 00:00:00' # end_date1 = '2015-04-08 00:01:01' # seconds_span = time_seconds_span(start_date1, end_date1) # print(seconds_span) # # # 2、计算分钟差。向下取整 # start_date2 = '2015-04-07 00:00:00' # end_date2 = '2015-04-07 00:01:01' # mins_span = time_minutes_span(start_date2, end_date2) # print(mins_span) # # # 3、计算小时差。向下取整 # start_date3 = '2015-04-07 00:00:00' # end_date3 = '2015-04-07 02:01:00' # hours_span = time_hours_span(start_date3, end_date3) # print(hours_span) # # # 4、计算天数差。向下取整 # start_date4 = '2015-04-07' # end_date4 = '2015-04-15' # days_span = date_days_span(start_date4, end_date4) # print(days_span) # # # 5、计算月数差。向下取整 # start_date5 = '2015-04-02' # end_date5 = '2015-05-03' # months_span = date_months_span(start_date5, end_date5) # print(months_span) # # # 6、计算年数差。向下取整 # start_date6 = '2015-04-02' # end_date6 = '2017-05-03' # years_span = date_years_span(start_date6, end_date6) # print(years_span) # 一、相同日期格式的时间距离 start_date = '2009-02-28 00:00:04' end_date = '2010-03-01 01:02:03' cha = gap_start2end(start_date, end_date) print(cha)