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the index

O Pollice, Gary (Head First Object-Oriented Analysis &
Design), 392

polymorphism, 392
object API, 292
pop() method, arrays, 138
object-oriented languages, 368, 383
POS (point-of-sale) system, 178. (see also health club
object-oriented programming (OOP), 392
example)
objects, 366, 368, 377, 383. (see also classes; methods)
pound sign (#), preceding comments, 95, 205
offset value (index) of strings, 42
print() function, 4, 35, 387
OOP (object-oriented programming), 392
program. (see code)
open() function, 116, 144
programming idioms, 386
OptionMenu() widget, 284–290, 292
protocol events, 321–322
Options menu, 22
protocol() method, apps, 322
ordered lists. (see also sorting data)
pseudo-code, 127
.py file extension, 7

P pygame library, 219–223, 229, 255
downloading and installing, 220
importing, 221, 226
pack() method, tkinter, 235–236, 238, 264, 269 mixer object for, 221, 226
packages (third-party libraries), 220, 223 platforms supported by, 219
setting volume, 339
parameters for functions, 96–98, 101, 111
Python, 9
parentheses (()) books about, 386
in format strings, 182 command-line execution of, 391
in function definition, 82
compared to Java and C#, 9
pass statement, 221, 255 integrated into other languages, 388
paths in code, 13, 20–21 programming idioms for, 386
pdb debugger, 390 systems supporting, 9
version 2 of, 387
percentage symbol (%), preceding format strings, 180–182
versions of, 9
period (.), in library function request, 69
Python IDE. (see IDLE)
permissions for files, 295
Python Shell, 5
play() method, sounds, 221 errors displayed in, 295
plus sign (+), addition operator, 58 running code in, 8
point-of-sale (POS) system, 178. (see also health club .pyw file extension, 237
example)

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