Beginning Python from Novice to Pro by Magnus Lie Hetland

By Magnus Lie Hetland

Achieve a primary figuring out of Python’s syntax and lines with the second one version of starting Python, an up–to–date advent and functional reference. protecting a big selection of Python–related programming issues, together with addressing language internals, database integration, community programming, and internet providers, you’ll be guided by means of sound improvement rules. Ten accompanying tasks will make sure you can get your fingers soiled in no time.
Updated to mirror the newest in Python programming paradigms and several other of the main the most important gains present in the approaching Python 3.0 (otherwise referred to as Python 3000), complicated subject matters, equivalent to extending Python and packaging/distributing Python functions, also are covered.
What you’ll learn
- turn into a educated Python programmer via following besides a pleasant, functional advisor to the language’s key features.
- Write code speedier via studying the best way to make the most of complex gains reminiscent of magic tools, exceptions, and abstraction.
- achieve perception into sleek Python programming paradigms together with checking out, documentation, packaging, and distribution.
- examine via following besides ten attention-grabbing tasks, together with a P2P file–sharing program, chat purchaser, game, distant textual content editor, and extra. entire, downloadable code is equipped for every project!
Who is that this ebook for?
Programmers, amateur and differently, looking a entire creation to the Python programming language.
About the Apress starting Series
The starting sequence from Apress is the ideal option to get the knowledge you must land that the most important entry–level task. those books will train you a typical and critical know-how from the floor up simply because they're explicitly designed to take you from “novice to professional.” You’ll begin your trip via seeing what you want to know—but with out unnecessary idea and filler. You’ll construct your ability set by means of studying tips on how to prepare real–world initiatives step-by-step. So no matter if your objective is your subsequent occupation problem or a brand new studying chance, the start sequence from Apress will take you there—it is your relied on consultant via surprising territory!

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Note If you are familiar with other computer languages, you may be used to terminating every line with a semicolon. There is no need to do so in Python. A line is a line, more or less. You may add a semicolon if you like, but it won’t have any effect (unless more code follows on the same line), and it is not a common thing to do. What happened here? The >>> thingy is the prompt. ". ” and you get a new prompt below that. ■Note The term “printing” in this context refers to writing text to the screen, not producing hard copies with a printer.

If math makes you queasy, don’t worry: variables in Python are easy to understand. A variable is basically a name that represents (or refers to) some value. For example, you might want the name x to represent 3. To make it so, simply execute the following: >>> x = 3 This is called an assignment. We assign the value 3 to the variable x. Another way of putting this is to say that we bind the variable x to the value (or object) 3. After you’ve assigned a value to a variable, you can use the variable in expressions: >>> x * 2 6 Note that you need to assign a value to a variable before you use it.

That is not true of Python in general. 5 Putting print 2*2 in there, on the other hand, will print out 4. 5. In case you’re wondering—yes, it does do something. It calculates the product of 2 and 2. However, the result isn’t kept anywhere or shown to the user; it has no side effects, beyond the calculation itself. 0, print is a function, which means you need to write print(42) instead of print 42, for example. Other than that, it works more or less like the statement, as described here. The difference between statements and expressions may be more obvious when dealing with assignments.

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