Download Beginning Python: From Novice to Professional (2nd Edition) by Magnus Lie Hetland PDF

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By Magnus Lie Hetland

Achieve a basic figuring out of Python's syntax and lines with the second one version of starting Python, an up–to–date creation and useful reference. protecting a wide range of Python–related programming themes, together with addressing language internals, database integration, community programming, and net prone, you'll be guided through sound improvement rules. Ten accompanying tasks will make sure you can get your arms soiled in no time.

Updated to mirror the newest in Python programming paradigms and a number of other of the main an important positive aspects present in Python 3.0 (otherwise often called Python 3000), complicated subject matters, reminiscent of extending Python and packaging/distributing Python purposes, also are lined.

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Additional info for Beginning Python: From Novice to Professional (2nd Edition)

Sample text

But what if you want to round a given number down? 9 years old, but you would like to round that down to 32 because she isn’t really 33 yet. Python has a function for this (called floor)—it just isn’t available directly. As is the case with many useful functions, it is found in a module. 7. Function calls can also be used as statements if you simply ignore the return value. CHAPTER 1 ■ INSTANT HACKING: THE BASICS Modules You may think of modules as extensions that can be imported into Python to extend its capabilities.

Numbers[-3:-1] [8, 9] It seems you cannot access the last element this way. How about using 0 as the element “one step beyond” the end? >>> numbers[-3:0] [] Not exactly the desired result. In fact, any time the leftmost index in a slice comes later in the sequence than the second one (in this case, the third-to-last coming later than the first), the result is always an empty sequence. com) extracts the domain name. Listing 2-2.

Note The exact appearance of the interpreter and its error messages will depend on which version you are using. This might not seem very interesting, but believe me—it is. This is your gateway to hackerdom—your first step in taking control of your computer. In more pragmatic terms, it’s an interactive Python interpreter. " When you press the Enter key, the following output appears: Hello, world! >>> ■Note If you are familiar with other computer languages, you may be used to terminating every line with a semicolon.

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