By Matt Telles

Python, a robust and versatile normal objective programming language is transforming into in acceptance as extra humans develop into attracted to programming utilizing open resource languages. "Python Power!: the excellent Guide”"shows readers the right way to use Python to run websites, write GUI interfaces, keep an eye on number-crunching code, strategy huge XML info units, construct try suites for C or Java code, and lots more and plenty extra. Technical themes are defined in actual fact and concisely and end-of-chapter initiatives inspire the reader to application on their lonesome. a close desk of contents and a whole, well-organized index make this e-book an exceptional reference software. All code utilized in the publication should be on hand for obtain at the better half site.

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Extra info for Python Power!: The Comprehensive Guide

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Q finally: The finally statement is used in an exception handling block for things that must be done before any exception in a try block is thrown. You can save the exception information, close files, or whatever you might want to do when a serious error occurs. You cannot handle an exception in a finally statement, as illustrated in this example. x = input("Enter a number: ") y = 0 try : y = 10 / x print "Y = ", y finally : print "In Finally Y = ", y Q raise: The raise keyword allows you to raise your own exceptions in your own Python application code.

Python supports the basic binary operators that you would expect: + The addition operator - The subtraction operator * The multiplication operator / The division operator. For numeric values, these operators work the way you would expect. There are a few catches and caveats work mentioning, however. Python will assume data type, depending upon the information supplied. Consider the following example. X = 10/3 Python has no way of knowing what you intended the data types to be in the above statement.

First, enter the line: if x == 2: Notice that the editor auto-indents the next line in about eight characters. ) Then press the backspace key. Notice that the cursor moves back to the left hand side of the screen. Type some number of spaces, say two, and enter: print “This is a test” 23 QQQ CHAPTER 2 } Python Language Overview Press the Enter key again, and you will see that the editor indents two spaces as well. The indentation level doesn’t matter, except that it should be consistent. Now, why did I say it “kind of” matters as to the level of indentation?

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