Download e-book for kindle: Learning Python: Powerful Object-Oriented Programming (4th by Mark Lutz

By Mark Lutz

Google and YouTube use Python simply because it's hugely adaptable, effortless to keep up, and permits speedy improvement. for you to write top of the range, effective code that's simply built-in with different languages and instruments, this hands-on e-book may help you be effective with Python quick -- even if you're new to programming or simply new to Python. It's an easy-to-follow self-paced instructional, in line with writer and Python specialist Mark Lutz's renowned education direction.

Each bankruptcy includes a stand-alone lesson on a key element of the language, and contains a particular Test Your Knowledge part with functional routines and quizzes, so that you can perform new abilities and try your figuring out as you cross. You'll locate plenty of annotated examples and illustrations that can assist you start with Python 3.0.

* find out about Python's significant integrated item forms, similar to numbers, lists, and dictionaries
* Create and strategy gadgets utilizing Python statements, and research Python's basic syntax version
* constitution and reuse code utilizing capabilities, Python's uncomplicated procedural instrument
* find out about Python modules: programs of statements, capabilities, and different instruments, equipped into greater parts
* observe Python's object-oriented programming software for structuring code
* find out about the exception-handling version, and improvement instruments for writing higher courses
* discover complex Python instruments together with decorators, descriptors, metaclasses, and Unicode processing

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Extra resources for Learning Python: Powerful Object-Oriented Programming (4th Edition)

Example text

REMEMBER Before you start writing some special functionality to process strings, check whether someone else has already done the work for you. The Cheat Sheet lists the most commonly used string methods. URLError: log("Error retrieving: " + url) return '' This is called a try / except block (see Chapter 10). urlopen() function, which tries to open a remote URL. py program works as-is, but it's missing a few elements that are necessary to make it a fully functional Python program that follows the conventions of good programming: • • Docstrings for each function and class method.

Passing information to a method The parentheses at the end of a method—for example, upper()—tell Python to perform the action associated with the method (that is, to call the method). upper 42 The parentheses have another use, too. When calling some methods, you sometimes need to include additional information about how the method should act. You put this information (also called the argument) inside the parentheses. This is called passing data (or passing an argument) to the method.

Indentation is so important to Python that Pythonistas printed up a T-shirt: Python: programming the way Guido indented it Code block syntax There are two simple syntax rules to remember about code blocks: 49 • • The code on the first line of a code block always ends with a colon (:). The code underneath the first line of a code block is indented. Python programmers almost always use four spaces for the first level of indentation, eight spaces for the next level (a code block nested inside another code block), and so on.

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