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@timefuncdef expensive_function (): For x in Get_number (): i = x ^ x ^ x return ' so Me result! ' # prints "Expensive_function took 0.72583088875 seconds" result = Expensive_function ()Of course, you can use context management to make it more powerful, to add checkpoints or some other functionality:import time class timewith (): def __init__ (Self, name= "): Self.name = name Self.st Art = Time.time () @property def elapsed (self): return Time.time ()-Self.start DEF CHEC Kpoint (self,

Although NumPy users are rarely interested in the span information of arrays, they are an important factor in building a non-replicated array view. The span can even be negative, which makes the array move back in memory, such as in the slice obj[::-1] or obj[:,::-1].Advanced Array OperationsIn addition to the fancy index, slice, Boolean conditional take subset and other operations, the array has many ways to operate. While the advanced functions in p

事 its prerequisite. 5. A program to do only one thing, the program to be able to collaborate. The program has to be able to handle text streams because this is the most common interface. 6. Principle: You cannot determine where the program will consume running time, and bottlenecks often occur in unexpected places. So don't be in a hurry to find a place to change the code unless you have confirmed that it is the bottleneck. 7. Principle: Measure. Don't optimize your speed until you've measured t

Ajax| News Ajax Hack Hack 11 dynamic generation style Dynamically define and develop CSS styles for Web content.JavaScript and DOM programming allow users to define CSS style attributes and apply them to page elements. A typical example is a wiki page that allows users to design their own page schemes and styles.In general, the better approach is to separate the style definition from the JavaScript code. Such habits allow elements to be expanded independently, reducing the complexity of Web page

waist like a girl's prom, this crappy evil font is a rock band? I'm going to use this fancy font for the title of the text, it needs to be big enough anywhere, and this fancy font is going to be the focus of this piece. You usually rarely use this font again, but it's much bigger, so that's what people see. The second font is very common, and the reader will not feel it in the whole article. This type of

, character or personality. These fonts are a collection of all the moods of the time, this funny-looking typeface with a twisted waist like a girl's prom, this crappy evil font is a rock band? I'm going to use this fancy font for the title of the text, it needs to be big enough anywhere, and this fancy font is going to be the focus of this piece. You usually rarely use this font again, but it's much bigger

Annotation definition Annotations Annotation Class Fancy constructor for annotations can take parameters Annotation Class Special (Val why:string) Special ("Example") class Foo {} using Annotations @fancy class Foo { @fancy fun baz (@fancy foo:int): Int { return 1 } } annotations in the main co

selector:#sidebar p {font-style: italic;text-align: right;margin-top: 0.5em;}#sidebar h2 {font-size: 1em;font-weight: normal;font-style: italic;margin: 0;line-height: 1.5;text-align: right;}Here, unlike other p elements on the page, the p elements in the sidebar get special processing, and, unlike all other h2 elements on the page, the h2 elements in the sidebar get different special processing. The purpose of id is to define a style. Combined with the derived selector, IDs are displayed under

This is a creation in Article, where the information may have evolved or changed. The binary heap provides an O (LGN) time insertion, the deletion of minimal, degraded operations, and O (n) time merging operations; The Fibonacci heap provides a better operating time limit: O (1) insertion, O (LGN) Delete minimum, O (LGN) Delete, O (1) Merge. According to the introduction to the algorithm, the Fibonacci heap is particularly useful when deleting a minimum or delete operation is performed much less

In the previous example, we have demonstrated how to construct the user interface of the j2_program. Now there is a question: how to interact with the user interface? That is, how to obtain the value entered by the user through the user interface? See the following example. Package fancy. test; Import javax. microedition. MIDlet .*; Import javax. microedition. lcdui .*; Public class gettextboxvalue extends MIDlet implements commandlistener { Private d

ArticleDirectory The following news is transferred from opengl.org. If so, repeat BS Ms. It seems that I am still right with OpenGL in Linux. At least I won't be hanging on a tree. I saw it a long time ago. I don't have time to handle it. I leave it blank today, no matter whether the message is fake or not. I also promoted the following to support GL. However, I think there is a way for ARB to bypass and there are uncertain messages. ms transfers the default OpenGL implementation

Remember 10 practical superstepsCss3Button design? In today's articleArticleIn this article, we will provide you with 40 well-selected css3 button development tutorials. I believe you have some knowledge about the cool EFFECTS OF THE css3 button in the previous article, you can learn more about how to create beautiful css3 buttons and what to wait! Animated buttons with css3[Online Demo | online tutorial] Fancy 3D button with css3[Online Demo |

(data_2d[1, 2] = = Data_2d[1][2])Print (' ↑---------------------class5\n\n ')# index method, 3 kinds# 1, slice index, slice as the original array view, data referencedata = Np.arange (1, 6) # array ([1,2,3,4,5])Data_slice = data[1:3] # array ([2,3]),Print (Data_slice)Data_nd = Np.arange (1). Reshape (3, 3) # The slice index of a high-dimensional array can also be mixed with an integer indexData_slice = data_nd[1, 1:] # array ([5,6])Print (Data_slice)Data_slice = data_nd[2,:] # array ([7,8,9]),:

Class SelectorIn CSS, the class selector is displayed with a point number: Copy Code code as follows: . Center {Text-align:center} In the above example, all HTML elements that have the center class are centered. In the following HTML code, the H1 and P elements all have the center class. This means that both will comply with the rules in the. Center selector. Copy Code code as follows: This heading would be center-aligned This paragraph would also be ce

and it's right after coding," which is certainly a fallacy, and the URI is the victim of this fallacy. If the string is encoded correctly, that's fine, and if it's not, it's over, because this string can't be parsed. In fact, the document does not escape the word/number meaning that it assumes that the path string is correctly encoded (that is, the correct use/to separate the path) and that it is not properly coded (other parts except/are still required to encode). It would be nice if Httpbuil

The binary heap provides an O (LGN) time insertion, the deletion of minimal, degraded operations, and O (n) time merging operations; The Fibonacci heap provides a better operating time limit: O (1) insertion, O (LGN) Delete minimum, O (LGN) Delete, O (1) Merge. According to the introduction to the algorithm, the Fibonacci heap is particularly useful when deleting a minimum or delete operation is performed much less often than other operations. Some of the graph's algorithms (Calculate minimum sp

In CSS, the class selector is preceded by the class name with a dot number, if the multi-class is not to hit more than one point number and the. Important.urgent this form. Class SelectorIn CSS, the class selector is displayed with a dot number: . Center {Text-align:center} In the example above, all HTML elements that have the center class are centered.In the following HTML code, both the H1 and P elements have the center class. This means that both will adhere to the rules in the. Center s

. util. ArrayList;Import java. util. List;Import java. util. concurrent. TimeUnit;/***-----------------------------------------* @ Description TODO* @ Author fancy* @ Mailbox fancydeepin@yeah.net* @ Date 2012-8-27 *-----------------------------------------*/Www.2cto.comPublic class ProxyApp { Public static void main (String [] args ){// ArrayList proxy, used to calculate the time required for each method callList ArrayList. class. getClassLoader (),/*

Box-sizingPeople slowly realized that the traditional box model was not straightforward, so they added a new box-sizing CSS property called.When you set an element to be, the padding box-sizing: border-box; and border of this element no longer increases its width.Here is an example of the same as the previous page, the only difference is that two elements are set box-sizing: border-box;DOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> title>Box-sizingtitle> style> /** {box-

Box modelAs we discuss the width, we should talk about another key thing related to it: the box model .When you set the width of the element, the actual element that is displayed exceeds your settings:This is because the elements ' borders and padding will open up the elements.Look at the following example, two elements of the same width display different actual widths.Look at the code:DOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> title>Box modeltitle> style>. Simple{width:400