python计算时间差之seconds()函数和total_seconds()函数的区别

前言

1、在python中经常会用到计算两个时间差，两个日期类型进行相减可以获取到时间差。

2、 seconds  函数获取的是仅仅是时间差的秒数，忽略微秒数，忽略天数。

3、 total_seconds() 函数是获取两个时间之间的总差。

4、 total_seconds() = (td.microseconds+ (td.seconds + td.days * 24 * 3600) * 10**6) / 10**6  # td是timedelta对象

实例

实例1：

#-*- coding: UTF-8 -*-
'''
Created on 2017年10月6日
@author: yuthzi
'''

import datetime

t1 = datetime.datetime.strptime("2017-9-06 10:30:00", "%Y-%m-%d %H:%M:%S")
t2 = datetime.datetime.strptime("2017-9-06 12:30:00", "%Y-%m-%d %H:%M:%S")

interval_time = (t2 - t1).seconds # 输入的结果：7200
total_interval_time = (t2 - t1).total_seconds() # 输出结果是: 7200.0
print interval_time
print total_interval_time

# 换一个方式
t1 = datetime.datetime.strptime("2017-9-06 10:30:00", "%Y-%m-%d %H:%M:%S")
t2 = datetime.datetime.strptime("2017-9-08 12:30:00", "%Y-%m-%d %H:%M:%S")
interval_time = (t2 - t1).seconds # 输入的结果：7200
total_interval_time = (t2 - t1).total_seconds() # 输出结果是: 180000.0
print interval_time
print total_interval_time
td = (t2 - t1)
print((td.microseconds + (td.seconds + td.days * 24 * 3600) * 10**6) / 10**6)

# datetime.timedelta([days[, seconds[, microseconds[, milliseconds[, minutes[, hours[, weeks]]]]]]])
td = datetime.timedelta(6, 5, 1, 800, 12, 3)
print td # 6 days, 3:12:05.800001
print td.seconds # 11525 忽略微秒和天
print td.total_seconds() # 529925.800001

实例2：

import datetime

time_1 = '2021-09-17 08:45:56'
time_2 = '2021-09-17 08:30:00'

time_1_struct = datetime.datetime.strptime(time_1, "%Y-%m-%d %H:%M:%S")
time_2_struct = datetime.datetime.strptime(time_2, "%Y-%m-%d %H:%M:%S")

print((time_1_struct - time_2_struct).total_seconds()) # 输出：956.0
print((time_1_struct - time_2_struct).seconds) # 输出：956

interval_time = (time_2_struct - time_1_struct).seconds # 输出的结果：85444
total_interval_time = (time_2_struct - time_1_struct).total_seconds() # 输出结果是: -956.0


######日期不同

time_1 = '2021-09-16 08:45:56'
time_2 = '2021-09-17 08:30:00'

time_1_struct = datetime.datetime.strptime(time_1, "%Y-%m-%d %H:%M:%S")
time_2_struct = datetime.datetime.strptime(time_2, "%Y-%m-%d %H:%M:%S")

print((time_1_struct - time_2_struct).total_seconds()) # 输出：-85444.0
print((time_1_struct - time_2_struct).seconds) # 输出：956

 

去期待陌生，去拥抱惊喜。