By Dave Kuhlman
This record is a self studying record for a path in Python programming. This direction includes (1) an element for newbies, (2) a dialogue of a number of complex subject matters which are of curiosity to Python programmers, and (3) a Pythonworkbook with plenty of routines.
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Regular expressions are a really robust instrument for manipulating textual content and information. they're now typical beneficial properties in a variety of languages and well known instruments, together with Perl, Python, Ruby, Java, VB. internet and C# (and any language utilizing the . internet Framework), personal home page, and MySQL.
for those who don't use commonplace expressions but, you can find during this e-book an entire new global of mastery over your facts. in the event you already use them, you'll take pleasure in this book's remarkable element and breadth of assurance. in the event you imagine you recognize all you must learn about ordinary expressions, this publication is a gorgeous eye-opener.
As this booklet indicates, a command of standard expressions is a useful ability. typical expressions let you code complicated and refined textual content processing that you simply by no means imagined may be computerized. ordinary expressions can prevent time and aggravation. they are often used to craft stylish options to a variety 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 by means of with no them.
but regardless of their huge availability, flexibility, and remarkable energy, average expressions are often underutilized. but what's energy within the palms of a professional should be fraught with peril for the unwary. gaining knowledge of general Expressions might help you navigate the minefield to changing into a professional and assist you optimize your use of standard expressions.
getting to know usual Expressions, 3rd variation, now contains a complete bankruptcy dedicated to Hypertext Preprocessor and its strong and expressive suite of standard expression features, as well as stronger personal home page insurance within the important "core" chapters. moreover, this version has been up to date all through to mirror advances in different languages, together with improved in-depth assurance of Sun's java. util. regex package deal, which has emerged because the average Java regex implementation. subject matters include:
* A comparability of good points between various models of many languages and instruments
* How the ordinary expression engine works
* Optimization (major discounts on hand right here! )
* Matching simply what you will have, yet now not what you don't wish
* Sections and chapters on person languages
Written within the lucid, wonderful tone that makes a posh, dry subject develop into crystal-clear to programmers, and sprinkled with ideas to complicated real-world difficulties, studying general Expressions, 3rd version bargains a wealth info that you should placed to rapid use.
Reviews of this new version and the second one edition:
"There isn't a greater (or extra invaluable) publication on hand on general expressions. "
--Zak Greant, dealing with Director, eZ Systems
"A genuine tour-de-force of a e-book which not just covers the mechanics of regexes in notable aspect but additionally talks approximately potency and using regexes in Perl, Java, and . web. .. should you use usual expressions as a part of your specialist paintings (even should you have already got a great publication on no matter what language you're programming in) i might strongly suggest this ebook to you. "
--Dr. Chris Brown, Linux Format
"The writer does a great task best the reader from regex beginner to grasp. The publication is intensely effortless to learn and chock filled with valuable and correct examples. .. usual expressions are worthy instruments that each developer must have of their toolbox. gaining knowledge of average Expressions is the definitive consultant to the topic, and a very good source that belongs on each programmer's bookshelf. Ten out of Ten Horseshoes. "
--Jason Menard, Java Ranch
Study Python Visually is a contemporary step forward that makes studying programming extra intuitive, more uncomplicated, and enjoyable. utilizing the main simple method of studying that all of us inherently be aware of from formative years, "Learn Python VISUALLY" solves the comprehension challenge that such a lot of different books can't appear to bridge.
Are looking to study SciPy and NymPy fast? reduce throughout the complexity of on-line documentation with this concise and illustrated publication, and observe how simply you will get in control with those Python libraries. You’ll comprehend why they’re strong adequate for plenty of of today’s prime scientists and engineers.
Have interaction with the area and speedily prototype IoT functions utilizing PythonAbout This BookRapidly prototype even complicated IoT purposes with Python and placed them to sensible useEnhance your IoT abilities with the main up to date applicability within the box of wearable tech, clever environments, and residential automationInteract with undefined, sensors, and actuators and keep an eye on your DIY IoT initiatives via PythonWho This booklet Is ForThe e-book is perfect for Python builders who are looking to discover the instruments within the Python environment which will construct their very own IoT functions and paintings on IoT-related tasks.
Additional info for A Python Book: Beginning Python, Advanced Python, and Python Exercises
Or, use a dictionary of functions. 1 The def statement The def statement is used to define functions and methods. It produces a function/method (object) and binds it to a variable in the current namespace. Although the def statement is evaluated, the code in its nested block is not executed. Pythonic wisdom: If it's not tested, it's broken. 2 Returning values The return statement is used to return values from a function. Using commas actually returns a single tuple. The default value is None.
1 The None value/type The unique value None is used to indicate "no value", "nothing", "nonexistence", etc. There is only one None value; in other words, it's a singleton. Example: >>> flag = None >>> >>> if flag is None: ... print 'clear' Page 35 A Python Book ... clear >>> if flag is not None: ... print 'hello' ... 2 Boolean values True and False are the boolean values. All other values, including True, act as true values. A set does not contain duplicates. Sets support several set operations, for example: union, intersection, difference, ...
Solution: count = 0 while True: count += 1 if count > 5: break print count ● Notes: ○ A for statement that uses range() or xrange() would be better than a while statement for this use. 8 try: except: statement Exceptions are a systematic and consistent way of processing errors and "unusual" events in Python. Caught and uncaught exceptions Uncaught exceptions terminate a program. The try: statement catches an exception. Almost all errors in Python are exceptions. Evaluation (execution model) of the try statement When an exception occurs in the try block, even if inside a nested function call, execution of the try block ends and the except clauses are searched for a matching exception.
A Python Book: Beginning Python, Advanced Python, and Python Exercises by Dave Kuhlman