beginning python from novice to professional second edition pdf download

... composite-map-key | map-key-many-to-many | index | composite-index | index-many-to-many |index-many-to-any), (element | one-to-many | many-to-many | composite-element | many-to-any),loader?, Trang 8A ... reassuring that in order to make navigation possible directly from the Advert to its associated Picture, we can in fact use a one-to-one mapping entry We need to be able to nav-igate in this direction ... items are stored and retrieved from a bag is completely ignored Although the bag’s table does not contain enough information to determine the order ofits contents prior to persistence into the table,

Ngày tải lên: 09/08/2014, 14:20

... just like a stack of plates You can put plates on top, and you can remove plates from the top The last one you put into the stack is the first one to be removed (This principle is called last-in, ... method is used to remove the first occurrence of a value: >>> x = ['to', 'be', 'or', 'not', 'to', 'be'] >>> x.remove('be') >>> x ['to', 'or', 'not', 'to', 'be'] >>> ... same thing will happen if you have stored 'Gumby' and the user writes 'gumby', or even 'GUMBY' A solution to this is to convert all names to lowercase both when stor-ing and searching The code would

Ngày tải lên: 12/08/2014, 10:21

... this chapter, you learn how to group statements into functions, which enables you to tell the computer how to do something, and to tell it only once. You won’t need to give it the same detailed ... “Why Would I Want to Modify My Parameters?” earlier in this chapter), you can store only one name at a time It would be nice to be able to store more names, like this: >>> store(data, name1, ... that stores names and that allows you to look up people by their first, middle, or last names. You might use a data structure like this: storage = {} storage['first'] = {} storage['middle']

Ngày tải lên: 12/08/2014, 10:21

... require an object to belong to a tain class or to implement a certain interface, Python often simply requires it to follow some given protocol cer-So, to be a sequence, all you have to do is follow ... descriptor protocol may be found in the Python Reference Manual (http://python.org/doc/ref/ descriptors.html) A more thorough source of information is Raymond Hettinger’s How-To Guide for Descriptors ... In this section, I go into some more detail I cover only one magic method, iter , which is the basis of the iterator protocol The Iterator Protocol To iterate means to repeat something several

Ngày tải lên: 12/08/2014, 10:21

... about PythonWin, PyGTK, and PyQt, check out the project home pages (see Table 12-1) Downloading and Installing wxPython To download wxPython, simply visit the download page, http://wxpython.org/download.php ... of toolkits can also be found in the Python Wiki (http://wiki.python.org/moin/ Table 12-1. Some Popular GUI Toolkits Available for Python 1 “PyGTK, PyQt, Tkinter and wxPython comparison,” The Python ... Another toolkit that is gaining in popularity is wxPython This is a mature and feature-rich toolkit, which also happens to be the favorite of Python’s creator, Guido van Rossum We’ll use wxPython

Ngày tải lên: 12/08/2014, 10:21

... Twisted from twisted.internet import reactor from twisted.internet.protocol import Protocol, Factory class SimpleLogger(Protocol): def connectionMade(self): print 'Got connection from', self.transport.client ... Improved Logging Server, Using the LineReceiver Protocolfrom twisted.internet import reactor from twisted.internet.protocol import Factory from twisted.protocols.basic import LineReceiver class SimpleLogger(LineReceiver): ... construct such protocol objects when a new connection arrives If you just want to create instances of a custom protocol class, you can use the factory that comes with Twisted, the Factory class in

Ngày tải lên: 12/08/2014, 10:21

... install_lib copying build/lib/hello.py -> /path/to/python/lib/python2.5/site-packages byte-compiling /path/to/python/lib/python2.5/site-packages/hello.py to hello.pyc 386 CHAPTER 18 ■ PACKAGING YOUR ... and effort into the prototype. It is probably better to refactor and modify that prototype into a more functional system, for several reasons. One common problem that can occur is “second system ... useful to be able to find out exactly how, say, the iter function works, but even more impor- tant is the ability to easily create a prototype of the program you are about to write, just to see

Ngày tải lên: 12/08/2014, 10:21

... assigning to its attributes (top, bottom, left, right, topleft, topright, bottomleft, bottomright, size, width, height, center, centerx, centery, midleft, midright, midtop, and midbottom) or calling ... easy to add Useful Tools The only new tool you need in this project is Pygame, which you can download from the Pygame web site (http://pygame.org) To get Pygame to work in UNIX, you may need to ... (simple_guiclient.py) from xmlrpclib import ServerProxy, Fault from server import Node, UNHANDLED from client import randomString from threading import Thread from time import sleep from os import listdir

Ngày tải lên: 12/08/2014, 10:21

... handler, mod_python, 342, 343autoexec.bat file, 98, 216 automated tests, 351automatic checkerslimits to capabilities of, 361PyChecker/PyLint tools, 359–362, 364automatic refactoring tool (2to3), 599AWT ... constructor, Python DB API, 298 DateFromTicks constructor, Python DB API, 298 dates fields of Python date tuples, 233 datetime module, 234, 258, 456 DATETIME value, Python DB API, 298 DB API see Python ... Planet Python (http://planetpython.org) and The Daily Python-URL (http://pythonware.com/daily). Trang 6■ ■ ■ Python 3.0 T his book describes mainly the language defined by Python version 2.5 Python

Ngày tải lên: 12/08/2014, 10:21

... how to acquire the Hibernate tools, how to create and run the example from Chapter 1, and how to create a slightly larger application from scratch, driv-ing the database table generation from ... transient objects or persist changes to transient objects To persist the changes to a transient object, you would have to ask the session to save thetransient object to the database, at which point ... want to perform on our data, so wewill now take a look at the architecture we are going to use to do this Trang 4Building DAOsThe DAO pattern is well known to most developers The idea is to separate

Ngày tải lên: 09/08/2014, 14:20

... QL query to be stored in the annotations OneToMany M and F Allows a one -to- many association to be defined between entities OneToOne M and F Allows a one -to- one association to be defined ... from one-to-one to many-to-one by removing the unique constraint. Figure 5-6 shows this type of relationship. The One-to-Many and Many-to-One Association A one-to-many association (or from the ... Annotations Prior to annotations, the only way to create mappings was through XML files—although tools from Hibernate and third-party projects allowed part or all of these to be generated from Java source

Ngày tải lên: 09/08/2014, 14:20

... 3name is the name of the discriminator column.discriminatorType is the type of value to be stored in the column as selected from thejavax.persistence.DiscriminatorType enumeration of STRING, CHAR, ... filters to an entity or a collection FilterDef/FilterDefs Pk and T Allows named filters to be declared drawn from a column GenericGenerator Pk, T, M, and F Allows a Hibernate-specific generator to ... @GenericGenerator annotation to fill the void The attributes that can be supplied to the annotation are as follows: name is mandatory, and is used to identify the generic generator in the @GeneratedValueannotation

Ngày tải lên: 09/08/2014, 14:20

... simple query. The request has to be sent (usually over the network) to the server. The database server may have to compile the SQL into a query plan. The query plan has to be run and is limited largely ... you will have to use frequently, but it is useful should you need to turn to your database administrators for help in tuning your Hibernate application The easiest way to see the SQL ... from many -to- one First, we will demonstrate how to use one -to- many... crit.add(Example.create(supplier)); List results = crit.list(); When Hibernate translates our Example object into

Ngày tải lên: 09/08/2014, 14:20

... request from your end user to manage active users and expired users separately For this example, assume that the status is stored as a column on the user table One way to solve this problem is to ... Filters from Codepublic class SimpleFilterExample { public static void main (String args[]) {SessionFactory factory = new Configuration().configure().buildSessionFactory(); Session session = factory.openSession(); ... Chapter 8) When any changes to an entity are stored, a version column is updated to reflect the fact that the entity has changed When a subsequent user tries to commit changes to the same entity, the

Ngày tải lên: 09/08/2014, 14:20

... unable or unwilling to install the software directly from Eclipse, it is also possible todownload the tools as a ZIP file from the Hibernate site and copy the plug-ins directory from the archivedirectly ... Remote Site button shown in the upper right of Figure B-1 to add the site from which you will obtain the Hibernate Tools plug-in You will now need to enter the URL for the site from which Eclipse ... want to take advantage of annotations, youmust reconfigure it to run under Java 5 Add the -vmflag to the Eclipse command line to force the named JVM to load Eclipse For example, the shortcut to

Ngày tải lên: 09/08/2014, 14:20

... List<ScriptEngineFactory> factories = manager.getEngineFactories (); for (ScriptEngineFactory factory: factories){ System.out.println ("Engine name (full): "+ factory.getEngineName ... List<ScriptEngineFactory> factories = manager.getEngineFactories (); for (ScriptEngineFactory factory: factories)System.out.println ("Threading behavior: "+ factory.getParameter ("THREADING")); ... ScriptEngineFactoryproviders Passing nullto loaderis equivalent to calling the former constructor Trang 3The program uses the ScriptEngineManagerinstance to obtain a list of factories viathis

Ngày tải lên: 09/08/2014, 14:21

... assignment operator (.=) discussed in the previous section ■Note To concatenate means to combine... equal to == != === NA Is equal to, is not equal to, is identical to, is not equal to & ^ ... String Operators PHP s string operators (see Table 3-7) provide a convenient way in which to concatenate strings together There are two such operators, including the concatenation operator (.) ... operands Operators An operator is a symbol that specifies a particular action in an expression Many operators may be familiar to you Regardless, you should remember that PHP s automatic type

Ngày tải lên: 09/08/2014, 14:21

... platforms to talk to yours It also allows you to easilyupgrade your existing services and applications to use these standards, so you have asmooth glide path to upgrade your existing assets to standards-based ... AddressService.csand output.configto the tory that the new web site is implemented in, and add them to your project Trang 19direc-The next step is to add the settings from output.configto your Web.configfile ... set of enhancements to SOAP designed to guarantee message reliability to and from a web service It has guaranteed delivery and duplication elimination, as well as the facility to ensure that the

Ngày tải lên: 12/08/2014, 09:20

... form into symbolic variables, encouraging exportation into other systems. To accomplish this, he opted to continue development in C code rather than Perl. Ongoing additions to the PHP toolset ... generated from DocBook- based master files, which can be retrieved from the PHP project’s CVS server should you wish to convert to another format. The documentation is located in the directory manual ... Summary 626  Chapter 32: Stored Routines 627 Should You Use Stored Routines? 627 Stored Routine Advantages 627 Stored Routine Disadvantages 628 How MySQL Implements Stored Routines 629 www.it-ebooks.info ...

Ngày tải lên: 22/03/2014, 09:20

... works; it’s almost identical to the programs you developed in Chapter 1. So how can you modify this program to allow you to customize the message depending on a value stored in memory? There are, ... time around. To correct your example program, just go back to your editor and reenter the semicolon. Recompile, check for any other errors, and your program is fit to be run again. Horton_735-4C01.fm ... processed in your program. To understand this, you need to know a little bit about memory in your computer, so before you go into your first program, let’s take a quick tour of your computer’s...

Ngày tải lên: 19/03/2014, 14:09