format | 易学教程

How to deal with time values over 24 hours in python?

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问题 I'm dealing with a large amount of data that has both values and times(in strings). I am converting the string time values into datetime values with the following code: time = datetime.datetime.strptime(time, " %H:%M:%S.%f") The only problem is that some of my data has the format: 24:00:00.004. So some of the data is actually over 24 hours Python is giving me this error: ValueError: time data ' 24:00:00:004' does not match format ' %H:%M:%S.%f' Any ideas on how to deal with this problem 回答1:

How to format font style and color in echo

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问题 I have a small snippet of code that I want to style from echo. foreach($months as $key => $month){ if(strpos($filename,$month)!==false){ echo '<style = "font-color: #ff0000"> Movie List for {$key} 2013 </style>'; } } This is not working, and I've been looking over some resources to try to implement this. Basically I want font-family: Arial and font-size: 11px; and the font-color: #ff0000; Any php assistance would be helpful. 回答1: foreach($months as $key => $month){ if(strpos($filename,$month)

validating password format in Authlogic

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问题 Is there a way to get Authlogic to validate the format of a password, for instance must contain at least one letter and at least one number? The omission of a validates_format_of_password_options method to be used in the acts_as_authentic config block seems to indicate that Authlogic has the opinion that one should not be imposing such a constraint on one's users. I thought I would simply put in a normal ActiveRecord validates_format_of :password , but this means that a current_user object I

Parsing JPEG file format: Format of entropy-coded segments (ECS)?

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问题 I'm having difficulty understanding the ITU-T T.81 spec for the JPEG file format. Hopefully someone else here has tried to parse JPEG files and/or knows about the details of this file format. The spec indiates that the ECS0 segment starts after the SOS segment but I can't find where in the spec it actually talks about the format of the ECS0 segment or how do detect its start. Simple JPEG implementations online are of limited help because they assume many things about the JPEGs they parse. Can

Get date format like “Y-m-d H:i:s” from a php date

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问题 Does someone know a way to get a string from a date that contains the format of the date? <?php $date = date ("2009-10-16 21:30:45"); // smething like this? print date_format ($date); ?> I ask this because I'd like to optimize this function I've written, usually to get the date with a different timezone from a server, without doing particular things <?php function get_timezone_offset ($timezone, $date = null, $format = null, $offset_timezone = null) { if ($date == null) $date = date ($format)

Lisp-Stat 翻译 —— 第四章其它Lisp特性

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第四章其它Lisp特性上一章介绍了Lisp编程的基础，在那章里重点展示了对编写Lisp函数有用的编程技术。为了最高效地使用这些技术，知道Lisp和Lisp-Stat提供的函数和数据类型将是很有用的。本章旨在给出这些函数和数据类型的概貌。初次阅读，你可以略读，当你需要的时候再将其作为参考手册来使用。 4.1 输入/输出 Common Lisp编程语言包含一个可扩展的工具集，可以用来读写文件、格式化输出和自定义读取输入的方式。这些特征的完整讨论将占用几章内容，因此我只展示那些我发现的对统计编程有用的方面。更多的可扩展话题可以到一些Common Lisp书籍中找到。 4.1.1 Lisp读取器 Lisp读取器负责转化类型化的字符，它通过用户或者从文件中读取的内容将数据输出到Lisp数据项。当读取一个数字时，读取器负责识别是整数或者浮点数，然后将它转换为合适的内部表示。在Common Lisp里，对浮点数据类型有一些选择，可以通过short-float、single-short、double-float和long-float等符号来指定。读取浮点数用到的数据类型，比如说读取 2.0，由全局变量*read-default-float-format*控制，它的值是上边提到的四个数据类型中的一个。强制指定要解释的数字为双精度类型也是可能的，比如输入成2.d0。

Point cloud XYZ format specification

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问题 Is there an official specification for the XYZ format for point clouds? I've been searching all over and I didn't find it. I've seen that there are some files which line contains: points coordinates, (X Y Z for each point ) others contain coordinates plus colors, (X Y Z R G B for each point ) there are even others that have an "Intensity" parameter. I need to consider all the possibilities. 回答1: No, there is not an official specification about the .xyz format for point clouds. The .xyz format

Robots.txt - What is the proper format for a Crawl Delay for multiple user agents?

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问题 Below is a sample robots.txt file to Allow multiple user agents with multiple crawl delays for each user agent. The Crawl-delay values are for illustration purposes and will be different in a real robots.txt file. I have searched all over the web for proper answers but could not find one. There are too many mixed suggestions and I do not know which is the correct / proper method. Questions: (1) Can each user agent have it's own crawl-delay? (I assume yes) (2) Where do you put the crawl-delay

Why does DateTime::createFromFormat() fails and returns a boolean in my second example?

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问题 When I run this the first one is correctly created into a date. The second one fails, returning a boolean and so I cannot format. Is the time out of range? //works correctly $startDate = "2015-05-06 10:49:20.637133"; $start = DateTime::createFromFormat('Y-m-d h:m:s.u',$startDate); echo $start->format('m/d/y'); //doesn't work correctly $startDate = "2015-05-12 15:49:06.821289"; $start = DateTime::createFromFormat('Y-m-d h:m:s.u',$startDate); echo $start->format('m/d/y'); Code to reproduce the

How to draw a checkered flag to the Python screen?

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问题 QUESTION: Implement the following pseudocode to draw a checkered flag to the screen. 1. Ask the user for the size of the checkered flag (n). 2. Draw an n x n grid to the screen. 3. For i = 0,2,4,...,62: 4. row = i // n 5. offset = row % 2 6. col = (i % n) + offset Please copy and paste the link see the ouput: http://www.awesomescreenshot.com/image/45977/12eaef67de44c2b291ecd47fe8d10135 I implemented the pseudocode, but I need some help. I am keep getting this error: row, col = findGrid(x)