epoch | 易学教程

python convert datetime formatted string to seconds

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问题 I am trying to decode a date string to epoch but I have difficulties getting the timezone. This is the last modified date from Amazon S3 keys. time.strptime(key.last_modified, '%Y-%m-%dT%H:%M:%S.%Z') ValueError: time data u'2013-10-20T00:41:32.000Z' does not match format '%Y-%m-%dT%H:%M:%S.%Z' If I get rid of the timezone (.000Z) it works, but I need the timezone as well. 回答1: The .000Z is not recognized as a timezone offset. In fact, you have milliseconds and a timezone ( Z is UTC), and

Get milliseconds from epoch via HTTP

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问题 I am working on a microcontroller and don't want to keep track of time with the system clock. I want to make an HTTP request to get the current time in milliseconds from the epoch (1970). I already know how to form all the requests, I just can't find a url that can return this data to me. Who offers this as an API? I don't want to make an https request. 回答1: I have a site called Current Millis and theoretically infinite bandwidth. I think i can quickly write a php, say www.currentmillis.com

Use Moment.js to convert Unix epoch time to human readable time

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问题 I'm trying to use Moment.js to convert a Unix epoch time to a date and time. I'd also like to know how to have it formatted like below. Tuesday, November 22, 2016 6:00 PM 回答1: moment.unix(yourUnixEpochTime).format('dddd, MMMM Do, YYYY h:mm:ss A') 回答2: From the Docs: Unix Timestamp var day = moment.unix(1318781876); //seconds var day = moment(1318781876406); //milliseconds // and then: console.log(day.format('dddd MMMM Do YYYY, h:mm:ss a')); // "Sunday October 16th 2011, 9:17:56 am" 回答3: You

python2.6.6 Convert apache log timestamp to seconds since epoch (unix style)

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问题 As I am completely lost in the dozens of ways you find on stackoverflow to do timestamp conversions, so I will ask here the complete question: Convert this timestamp from an apache log (in CEST timezone): 30/Aug/2015:05:13:53 +0200 Into this: 1440904433 Using $ python --version Python 2.6.6 Verification: $ date --date @1440904433 Sun Aug 30 05:13:53 CEST 2015 $ date -u --date @1440904433 Sun Aug 30 03:13:53 UTC 2015 Bad results are: 1440911633 1440908033 My current code goes until here: >>>

Linux下NVIDIA驱动、CUDA、CUDNN的安装

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 0. 前言最近在学习PaddlePaddle在各个显卡驱动版本的安装和使用，所以同时也学习如何在Ubuntu安装和卸载CUDA和CUDNN，在学习过程中，顺便记录学习过程。在供大家学习的同时，也在加强自己的记忆。本文章以卸载CUDA 8.0 和 CUDNN 7.05 为例，以安装CUDA 10.0 和 CUDNN 7.4.2 为例。 1. 安装显卡驱动禁用nouveau驱动 sudo vim /etc/modprobe.d/blacklist.conf 在文本最后添加： blacklist nouveau options nouveau modeset=0 然后执行： sudo update-initramfs -u 重启后，执行以下命令，如果没有屏幕输出，说明禁用nouveau成功： lsmod | grep nouveau 下载驱动官网下载地址： https://www.nvidia.cn/Download/index.aspx?lang=cn ，根据自己显卡的情况下载对应版本的显卡驱动，比如笔者的显卡是RTX2070：下载完成之后会得到一个安装包，不同版本文件名可能不一样： NVIDIA-Linux-x86_64-410.44.run 卸载旧驱动以下操作都需要在命令界面操作

Converting UTC string to epoch time in javascript

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问题 How can I convert UTC date-time string (e.g. 2011-03-29 17:06:21 UTC ) into Epoch (milliseconds) in javascript? If this is not possible, is there any way to compare (like <, >) UTC date time strings? 回答1: Note that UTC date strings can be compared lexicographically, like strings, since the higher order values appear leftmost in the string. var s1 = '2011-03-29 17:06:21 UTC' , s2 = '2001-09-09 01:46:40 UTC'; s1 > s2; // => true s2 > s1; // => false You can extract the date fields from your

Get the number of days, weeks, and months, since Epoch in Java

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问题 I'm trying to get the number of days, weeks, months since Epoch in Java. The Java Calendar class offers things like calendar.get(GregorianCalendar.DAY_OF_YEAR), or Calendar.get(GregorianCalendar.WEEK_OF_YEAR), which is a good start but it doesn't do exactly what I need. Is there an elegant way to do this in Java? 回答1: You can use the Joda Time library to do this pretty easily - I use it for anything time related other than using the standard Java Date and Calendar classes. Take a look at the

图解 Kafka 水印备份机制

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 高可用是很多分布式系统中必备的特征之一，Kafka 日志的高可用是通过基于 leader-follower 的多副本同步实现的，每个分区下有多个副本，其中只有一个是 leader 副本，提供发送和消费消息，其余都是 follower 副本，不断地发送 fetch 请求给 leader 副本以同步消息，如果 leader 在整个集群运行过程中不发生故障，follower 副本不会起到任何作用，问题就在于任何系统都不能保证其稳定运行，当 leader 副本所在的 broker 崩溃之后，其中一个 follower 副本就会成为该分区下新的 leader 副本，那么问题来了，在选为新的 leader 副本时，会导致消息丢失或者离散吗？Kafka 是如何解决 leader 副本变更时消息不会出错？以及 leader 与 follower 副本之间的数据同步是如何进行的？带着这几个问题，我们接着往下看，一起揭开 Kafka 水印备份的神秘面纱。水印相关概念在讲解水印备份之前，我们必须要先搞清楚几个关键的术语以及它们的含义，下面我用一张图来示意 Kafka 分区副本的位移信息：如上图所示，绿色部分表示已完全备份的消息，对消费者可见，紫色部分表示未完全备份的消息，对消费者不可见。 LEO（last end offset

python - datetime with timezone to epoch

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问题 In the code below, I am calculating now epoch and beginning of current day epoch. import time import pytz from datetime import datetime tz1 = pytz.timezone('CST6CDT') utc = pytz.timezone('UTC') now = pytz.UTC.localize(datetime.utcnow()) now_tz = now.astimezone(tz1) print now_tz print now_tz.strftime('%s') begin_day = now_tz.replace(hour=0, minute=0, second=0) print begin_day print begin_day.strftime('%s') print statements: 2012-08-28 13:52:21.595718-05:00 1346187141 2012-08-28 00:00:00.595718

Display current time in epoch

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问题 I'm trying to display the current time in epoch, i'm not sure if this is correct, but i'm sure it's not since it's giving me an error: NSDate *currentDate = [NSDate date]; NSDate *epochDate = [NSDate dateWithTimeIntervalSince1970:currentDate]; Any idea of how to accomplish this? 回答1: NSString *epochTime = @"1347522689"; NSTimeInterval epochInterval = [epochTime longLongValue]; NSDate *epochNSDate = [[NSDate alloc] initWithTimeIntervalSince1970:epochInterval]; NSDateFormatter