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))0.8414709848078965>>>Import multiple modules at once>>> Print (PI)Traceback (most recent):File "Nameerror:name ' pi ' is not defined>>> Print (Math.PI)Traceback (most recent):File "Nameerror:name ' math ' is not defined# # #上面为导入之前 # # #下面为导入之后 # # #>>> from math import pi,sin>>> Print (PI)3.141592653589793>>> Print (sin (1))0.8414709848078965>>>Give the module a name>>> import math as M #as字句是给模块取名, here's named math m>>> Print (M.PI)3.141592653589793>>>Output multiple expressions>>> A = 123>

VO (Value object) value objectsTypically used for data transfer between business tiers, as is the case with PO, which contains only data. But it should be abstracted out of the business object that can correspond to the table, or not, depending on the needs of the business. Personally feel the same DTO (data transfer object) that is passed on the web.From the business model perspective, see the domain objects in the UML component Domain model. A Java object that encapsulates the business logic,

corresponding PO has 100 attributes.But we just show 10 fields on the interface,The client uses the Web service to get the data, and there is no need to pass the entire PO object to the client.At this point we can pass the result to the client with a DTO with only these 10 attributes, and this will not expose the service-side table structure. After the client is reached, if the interface is displayed with this object, then its identity will be converted to VO.O/R Mapper object/relationship Mapp

methods!.DAO (data Access object) Access objectsis one of Sun's standard Java EE design patterns, one of which is DAO, which is responsible for the operation of the persistence layer. Provides interfaces for the business layer. This object is used to access the database. Usually used in conjunction with PO, DAO contains various methods of operation of the database. Combine PO to perform related operations on the database. Sandwiched between business logic and database resources. With VO, provid

. Note: ' More. NET source and example, from Le Bo network www.lob.cn 1. AJ represents the coefficient of J-bit, which is a number in 0 and 1. 2.a (n-1) (n-1) for subscript, input method can not be typed so enclose in parentheses, avoid confusion. 3.2^2 represents 2 squared, and so on. hexadecimal Hexadecimal is a representation of the data in the computer. It is different from the decimal notation in our daily life. It consists of 0-9,a-f. The corres

In order to congratulate Tencent Weibo three anniversary birthday, by the CDC independent design, and Tencent Micro-Bo open platform for research and development of micro-blog client--pengo, today officially published. As the most interesting Tencent Weibo iphone client, what surprises will Pengo bring to everyone? We'll announce it at one by one immediately. One, full screen browsing, "big" splendor Pengo can be adapted to the WIFI/3G network, pr

What does the microblogging radar mean? Sina Weibo radar function can be located through the positioning system to search the vicinity of people, this and QQ, micro-letter near the function is the same OH. How to use the micro-BO radar Into the microblog, you can see the upper right corner of the radar sign. Click on the radar and then go to the radar function. In the radar function, can see three different search function, "person"

In this tutorial, I want to show you several methods that I usually use to create my picture "Bo-Pie" method. I've always liked Transformers, and this movie has given me a huge inspiration for me to create one. The car profile is one of my recent car models, the 1975 Chevrolet Corvette second-generation light cruiser. I use 3Dsmax 9 and VRay to do the modeling and rendering, using Photoshop for post-processing. Let's take a look at the following effe

Explore the new era of software industry development path, focus on the direction of digital economy development, pulse "deep integration" prospects, analysis of the future development of artificial intelligence, June 29 to July 2, 2018 soft Bo will be held in Beijing, a number of ministerial-level, provincial and municipal leaders, two "two chambers" academician in the General Assembly to speak, The seven exhibition areas focus on the latest achievem

. 5, micro-bo relative timeNow, the Jquery.weibo.search.js plug-in is basically implemented, but we find that each micro-blog display time seems to be not very normal, and has not implemented scrolling (animate) and Fade (fadeIn) effect. Because microblogging is using relative time to express the time of the microblogging plug-in, of course, we can also show the time, next, let us change the time of the microblogging creation (CREATED_AT) in the for

For the users of the grapefruit software to explain the detailed interpretation of the release of the micro-bo binding tutorial. Tutorial Sharing: If you're using a Twitter-bound word, you can log on to Sina Weibo on the Web page, then click on the settings inside the top right corner, click on the password to the right of the login name, and then see that there is a view of the current authorization, click to view the current authorizat

Custom view has always been its own short board, taking advantage of the company's project when not nervous, more to strengthen this practice. This series of articles mainly records their experience in the learning process of customizing view. When you brush Weibo, you find that the Micro-blog movement interface, the display of the motion integral has a very good-looking animation effect. OK, just start with my custom view path! Take a look at the final effect: Fractional color, fractional

Weibo navigation looks beautiful, doesn't bother you, and writes code directly. The above code is to use JS to achieve the micro-Bo navigation bar, the need for friends to refer to.

Go to the application square of Sina Weibo and search for "Delete management tool". Click the "Use Now" button, and then for the application authorization, you will open the following image of the micro-BO bulk Delete interface. Select the multiple selection boxes in the upper-right corner of the microblog you want to remove, and then click the Delete button. In addition, you can also use this interface before the lower left corner and a key backu

Bo-Yang station is now more popular optimization methods, has been countless owners to verify the practicality and effectiveness of this method. Let's take a look at some of the forms of blog-keeping station today. First, the type of This is the most common way to raise the first blog, is to raise a group of blogs, often updated, and then slowly the weight of the blog to upgrade up, and then link to the form of the weight of the blog into the site,

more focused on writing data access code.The DAO pattern is one of the standard Java EE design patterns. Developers use this pattern to separate the underlying data access operations from the high-level business logic. A typical DAO implementation has the following several components:1. A DAO factory class;2. a DAO interface;3. A concrete class that implements the DAO interface;4. Data transfer objects (sometimes called value objects).The specific DAO class contains the logic to access data fro