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 creation and sensible reference. protecting a wide range of Python–related programming issues, together with addressing language internals, database integration, community programming, and internet providers, you'll be guided via sound improvement ideas. Ten accompanying initiatives will make sure you can get your palms soiled in no time.
Updated to mirror the most recent in Python programming paradigms and several other of the main an important beneficial properties present in Python 3.0 (otherwise referred to as Python 3000), complex themes, resembling extending Python and packaging/distributing Python purposes, also are lined.
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Extra info for Beginning Python: From Novice to Professional (2nd Edition)
Py Making Your Scripts Behave Like Normal Programs Sometimes you want to execute a Python program (also called a script) the same way you execute other programs (such as your web browser or text editor), rather than explicitly using the 9. If you don’t understand this sentence, you should perhaps skip the section. You don’t really need it. CHAPTER 1 ■ INSTANT HACKING: THE BASICS Python interpreter. In UNIX, there is a standard way of doing this: have the first line of your script begin with the character sequence #!
Simply put, it’s telling a computer what to do. Computers can do a lot of things, but they aren’t very good at thinking for themselves. They really need to be spoon-fed the details. You need to feed the computer an algorithm in some language it understands. Algorithm is just a fancy word for a procedure or recipe—a detailed description of how to do something. Consider the following: SPAM with SPAM, SPAM, Eggs, and SPAM: First, take some SPAM. Then add some SPAM, SPAM, and eggs. If a particularly spicy SPAM is desired, add some SPAM.
The problem is that I haven’t really explained how it works yet. "? It’s called a string (as in “a string of characters”). Strings are found in almost every useful, real-world Python program and have many uses. ' There is one thing that may be a bit surprising about this example, though: when Python printed out our string, it used single quotes, whereas we used double quotes. What’s the difference? ' Here, we use single quotes, and the result is the same. So why allow both? " she said' In the preceding code, the first string contains a single quote (or an apostrophe, as we should perhaps call it in this context), and therefore we can’t use single quotes to enclose the string.