Beginning PythonFrom Novice to Professional, Second Edition 2008 phần 2 pps

... won’t help: ( 42) is exactly the same as 42. One lonely comma, however, can change the value of an expression completely: >>> 3*(40 +2) 126 >>> 3*(40 +2, ) ( 42, 42, 42) The tuple ... might expect: >>> 1, 2, 3 (1, 2, 3) >>> print 1, 2, 3 1 2 3 >>> print (1, 2, 3) (1, 2, 3) This behavior can be very useful if you want to combine text a...

Ngày tải lên: 12/08/2014, 10:21

... require an object to belong to a cer- tain class or to implement a certain interface, Python often simply requires it to follow some given protocol. So, to be a sequence, all you have to do is follow ... only when used inside a generator). In other words, generators consist of two separate components: the generator-function and the generator-iterator. The generator-function is...

Ngày tải lên: 12/08/2014, 10:21

... demonstrates the syntax used to create dictionaries: phone = { "Alice" : 23 4 525 32, "Boris" : 25 2336, "Clarice" : 23 525 25, "Doris" : 23 624 643 } person = { 'first ... assigning to its attributes (top, bottom, left, right, topleft, topright, bottomleft, bottomright, size, width, height, center, centerx, centery, midleft, midright,...

Ngày tải lên: 12/08/2014, 10:21

... (x to the power of n) is the number x multiplied by itself n-1 times (so that x is used as a factor n times). So power (2, 3) is 2 multiplied with itself twice, or 2 u 2 u 2 = 8. This is easy to ... this chapter, you learn how to group statements into functions, which enables you to tell the computer how to do something, and to tell it only once. You won’t need to giv...

Ngày tải lên: 12/08/2014, 10:21

... vM.4.01.03 .27 20 1 -22 9- 121 - 127 -20 010 626 ) with ESMTP id < ;20 04 122 00 022 42. ADASD 123 .bar.baz@[43 .25 3. 124 .23 ]>; Thu, 20 Dec 20 04 00 :22 : 42 +0000 User-Agent: Microsoft-Outlook-Express-Macintosh -Edition/ 5. 02. 2 022 Date: ... (xyzzy.bar.baz [ 123 .456.789. 42] ) by frozz.bozz.floop (8.9.3/8.9.3) with ESMTP id BAA25436 for <magnus@bozz.floop>; Thu, 20...

Ngày tải lên: 12/08/2014, 10:21

... '0.1' def product(factor1, factor2): 'The product of two numbers' return factor1 * factor2 If you run the tests now, you should not get any errors. Try to play around with the ... need to wrap the directives like this (remember to use quotes around the path if you are a Windows user): <Directory /path /to/ your/directory> (Add the directives here) </Dire...

Ngày tải lên: 12/08/2014, 10:21

... LOW # 20 07 12 4.8 5.0 4.7 67.6 70.4 64.7 20 08 01 4.3 4.4 4 .2 66.7 69.5 63.8 20 08 02 4.0 4.1 3.9 66.1 68.9 63 .2 20 08 03 4 .2 4.3 4.0 65.7 68.6 62. 8 20 08 04 4.6 4.8 4.4 65.7 68.6 62. 7 20 08 05 5 .2 5.6 ... Low (20 07, 8, 113 .2, 114 .2, 1 12. 2), (20 07, 9, 1 12. 8, 115.8, 109.8), (20 07, 10, 111.0, 116.0, 106.0), (20 07, 11, 109.8, 116.8, 1 02. 8), (20 07, 1...

Ngày tải lên: 12/08/2014, 10:21

... method, 520 , 521 , 524 , 531 handle method, 521 , 522 , 525 , 531 hello method, 520 , 521 , 524 , 531 implementing, 520 – 525 query method, 520 , 521 , 522 , 524 , 530 start method, 523 , 524 , 531 stopping and ... functions in, 21 2 21 4 dir function, 21 8 documentation, 22 0, 22 1 exploring, 21 8 22 1 extinct modules in Python 3.0, 604 help function, 21 9 22 0 import statement, 20...

Ngày tải lên: 12/08/2014, 10:21

... http:// jonathanknudsen.com/. www.it-ebooks.info CHAPTER 2 ■ BUILDING MIDLETS 19 Using the Emulator Controls The J2ME Wireless Toolkit emulator appears as a generic mobile phone, as shown in Figure 2- 2. Figure 2- 2. Buttons on the J2ME Wireless Toolkit ... version 2. 2, and you can write adapter code to use other obfuscators. If you’re using the 2. 2 version of the toolkit, you just...

Ngày tải lên: 17/02/2014, 23:20

... Columns 624 Working with Transactions 625 Summary 626  Chapter 32: Stored Routines 627 Should You Use Stored Routines? 627 Stored Routine Advantages 627 Stored Routine Disadvantages 628 How ... Your Scripts 26 4 Upgrading Packages 26 4 Uninstalling a Package 26 5 Downgrading a Package 26 6 Introducing Pyrus 26 6 Installing Pyrus 26 6 Summary 26 7  Chapter 12: Date and T...

Ngày tải lên: 22/03/2014, 09:20