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the index
D DJ example. (see mixing software example)
Don’t Repeat Yourself (DRY), 88
data entry widgets DoubleVar() variable, 340, 345, 348
Checkbutton() widget, 331–335, 348 drop down lists, 248. (see also OptionMenu() widget)
Entry() widget, 261–262, 266–267, 269, 292 DRY (Don’t Repeat Yourself), 88
model for, 276–278, 285, 292
OptionMenu() widget, 284–290, 292
populating dynamically, 288–290, 292
RadioButton() widget, 272–273, 275–280, 292
restricting input to, 271–273 E
Scale() widget, 336–338, 340–345, 348
Text() widget, 261, 263, 266–267, 269, 292 Eclipse IDE, 395
data storage, 129–130 editors, 5, 395. (see also IDLE)
data structures, 131, 150. (see also arrays; hashes) Emacs editor, 395
list of, 152 encapsulation, 392
returning from functions, 164–167 endswith() method, strings, 56
database, 170–172, 175 Entry() widget, 261, 269, 292
datatypes, converting, 4, 9, 64–65, 75 creating, 266–267
date and time functions, 68–73 methods for, 262
daylight() function, time library, 70 equal sign (=), assignment operator, 4
debugging, 390 equal sign, double (==), equal to operator, 4, 15
decision points. (see branches) Eric IDE, 395
decode() method, 49 errors, 311. (see also debugging; testing)
crashes resulting from, 296
def keyword, 82, 111
displayed in Shell instead of GUI, 295
delete() method, data entry widgets, 262, 263, 267, 269
displaying in message boxes, 303–309
delivery company example, 258–291 exceptions, 296–300, 311
dynamic depot options for, 283–291 TypeError message, 63–64
errors in delivery tracking, handling, 294–310 ValueError message, 119–120
GUI for delivery system, 258–268 event loop, 233–234, 255
user input, controlling, 271–281
events
destroy() method, apps, 326, 348
handlers for, 239, 244–245, 255
dialog boxes, 248. (see also message boxes) from operating system, 319, 348
dictionaries. (see hashes) from Window Manager, 319–324, 326–327
directories, reading files in, 378–381 examples
delivery company example, 258–291
disk storage, 129
game show example, 216–254
you are here 4 399
