By Jürgen Scheible, Ville Tuulos
Mobile Python is the advent of Python programming language to the cellular space. This sensible hands-on publication teaches readers how you can detect their software principles at the Symbian OS. Programming at the Symbian cellular platform has been tough and time eating within the past. This leading edge new name will treatment this problem.
Chapters take care of issues which are in response to Python S60 gains and offered in an order that we could the consumer research first the “simple to code” ones after which expanding in complexity.
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Essential SQLAlchemy introduces a high-level open-source code library that makes it more uncomplicated for Python programmers to entry relational databases comparable to Oracle, DB2, MySQL, PostgreSQL, and SQLite. SQLAlchemy has turn into more and more renowned considering the fact that its free up, however it nonetheless lacks strong offline documentation. This sensible publication fills the distance, and since a developer wrote it, you get an target examine SQLAlchemy's instruments instead of an advocate's description of the entire "cool" features.
SQLAlchemy contains either a database server-independent SQL expression language and an object-relational mapper (ORM) that allows you to map "plain outdated Python objects" (POPOs) to database tables with out considerably altering your current Python code. crucial SQLAlchemy demonstrates the right way to use the library to create an easy database software, walks you thru uncomplicated queries, and explains tips on how to use SQLAlchemy to hook up with a number of databases at the same time with a similar Metadata. you furthermore may learn the way to:
* Create customized varieties for use on your schema, and whilst it's worthy to exploit customized instead of integrated kinds
* Run queries, updates, and deletes with SQLAlchemy's SQL expression language
* construct an item mapper with SQLAlchemy, and comprehend the diversities among this and lively checklist styles utilized in different ORMs
* Create gadgets, shop them to a consultation, and flush them to the database
* Use SQLAlchemy to version item orientated inheritance
* offer a declarative, energetic list trend to be used with SQLAlchemy utilizing the Elixir extension
* Use the SQLSoup extension to supply an automated metadata and item version in accordance with database mirrored image
In addition, you'll learn the way and while to take advantage of different extensions to SQLAlchemy, together with AssociationProxy, OrderingList, and more.
Essential SQLAlchemy is the much-needed advisor for each Python developer utilizing this code library. rather than a feature-by-feature documentation, this booklet takes an "essentials" technique that offers you precisely what you must develop into efficient with SQLAlchemy correct away.
Regular expressions are an exceptionally robust instrument for manipulating textual content and knowledge. they're now regular gains in quite a lot of languages and renowned instruments, together with Perl, Python, Ruby, Java, VB. internet and C# (and any language utilizing the . internet Framework), Hypertext Preprocessor, and MySQL.
in case you don't use commonplace expressions but, you can find during this booklet a complete new international of mastery over your info. if you happen to already use them, you'll get pleasure from this book's extraordinary aspect and breadth of assurance. should you imagine you recognize all you want to learn about commonplace expressions, this e-book is a gorgeous eye-opener.
As this booklet exhibits, a command of normal expressions is a useful ability. typical expressions let you code complicated and sophisticated textual content processing that you simply by no means imagined will be computerized. average expressions can prevent time and aggravation. they are often used to craft dependent recommendations to quite a lot of difficulties. as soon as you've mastered usual expressions, they'll develop into a useful a part of your toolkit. you'll ask yourself the way you ever acquired through with no them.
but regardless of their vast availability, flexibility, and extraordinary energy, general expressions are usually underutilized. but what's strength within the fingers of knowledgeable should be fraught with peril for the unwary. learning usual Expressions may help you navigate the minefield to changing into knowledgeable and assist you optimize your use of standard expressions.
studying normal Expressions, 3rd version, now encompasses a complete bankruptcy dedicated to Hypertext Preprocessor and its strong and expressive suite of standard expression capabilities, as well as better Hypertext Preprocessor insurance within the vital "core" chapters. additionally, this variation has been up to date all through to mirror advances in different languages, together with multiplied in-depth assurance of Sun's java. util. regex package deal, which has emerged because the commonplace Java regex implementation. issues include:
* A comparability of gains between diverse models of many languages and instruments
* How the common expression engine works
* Optimization (major discounts to be had the following! )
* Matching simply what you will want, yet now not what you don't wish
* Sections and chapters on person languages
Written within the lucid, interesting tone that makes a fancy, dry subject develop into crystal-clear to programmers, and sprinkled with options to advanced real-world difficulties, getting to know normal Expressions, 3rd version deals a wealth info so you might positioned to quick use.
Reviews of this re-creation and the second one edition:
"There isn't a greater (or extra helpful) booklet on hand on commonplace expressions. "
--Zak Greant, dealing with Director, eZ Systems
"A genuine tour-de-force of a ebook which not just covers the mechanics of regexes in remarkable aspect but in addition talks approximately potency and using regexes in Perl, Java, and . web. .. for those who use usual expressions as a part of your expert paintings (even in the event you have already got a superb publication on no matter what language you're programming in) i might strongly suggest this e-book to you. "
--Dr. Chris Brown, Linux Format
"The writer does a superb activity prime the reader from regex amateur to grasp. The publication is intensely effortless to learn and chock filled with valuable and correct examples. .. usual expressions are important instruments that each developer must have of their toolbox. studying commonplace Expressions is the definitive consultant to the topic, and an exceptional source that belongs on each programmer's bookshelf. Ten out of Ten Horseshoes. "
--Jason Menard, Java Ranch
The Python Developer's guide is designed to show skilled builders to Python and its makes use of. starting with a short advent to the language and its syntax, the booklet strikes quick into extra complicated programming themes, together with embedding Python, community programming, GUI toolkits, JPython, net improvement, Python/C API, and extra.
Python 201 is the sequel to my first booklet, Python a hundred and one. should you already be aware of the fundamentals of Python and now you need to visit the following point, then this can be the ebook for you! This booklet is for intermediate point Python programmers merely. There will not be any newbie chapters the following. This ebook is predicated onPython three.
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Extra info for Mobile Python: Rapid prototyping of applications on the mobile platform (Symbian Press)
Select the nickname of your phone and press ‘Send’. A popup note should be displayed on your phone asking ‘Receive message by way of Bluetooth . . ’ and you should select ‘Yes’. A message should then arrive in your inbox. Repeat these steps for the second installation ﬁle. In different Mac OS versions, the menus might look slightly different, but the process is basically the same. Also you might have to do Bluetooth pairing between your phone and your computer before you can send the ﬁle. 1. 9 Bluetooth devices found Linux Users You need the ussp-push and hcitool programs installed.
4 Installation for Linux Users We assume that your computer has either a built-in Bluetooth capability or an external Bluetooth dongle. Also, we assume that Bluetooth is detected correctly by your distribution and you have the obexftp and hcitool programs installed. In many distributions, they can be installed from packages obexftp and bluez-utils. 1. SIS ﬁles to your phone First, enable Bluetooth on your phone. Then, on the command line, execute the following command: hcitool scan This performs Bluetooth scanning.
It creates a new variable and gives the variable a value, for example: data = 5 mynewlist = "Symbian" The special value None denotes a missing value. You can re-use the same variable freely throughout a program. In some examples, we use capital letters for variable names. This is a common way in Python to denote variables whose values must not change (that is, they are constants), as a convenience to developers. The interpreter itself does not care if they are constant. multi_query(u"First name:", u"Last name:") This function displays a two-ﬁeld text input dialog.