[Python编程(第4版)].(Programming.Python.4th.Edition).Mark.Lutz.文字版

object identifiers, 553

object tags, 553

postscript method, 554

programming, 551–554

scrolling canvases, 554–556

tag_bind method, 563

tkraise method, 553

update method, 589

xscrollcommand option, 526

xview method, 526

yscrollcommand option, 526

yview method, 526

canvases

basic operations, 550–551

clearing, 561

coordinate system, 551

defined, 550

dragging out object shapes, 561

event support, 560–564

image thumbnails, 557–560

moving objects, 562

object construction, 552

object identifiers, 553

object tags, 553

scrolling, 554–556

cat command, 99

cd command, 106

cenviron module, 1497

cgi module

escape function, 59, 1186, 1202–1206,

1256, 1265

FieldStorage class, 1152, 1166, 1187, 1255

functionality, 786, 1129

PyMailCGI program and, 1232

CGI scripts, 1125

(see also PyMailCGI program; server-side

scripting/processing)

adding common input devices, 1163–1166

adding pictures, 1146–1149

adding user interaction, 1149–1157

building first web page, 1135–1140

changing input layouts, 1166–1170

checking inputs, 1190–1192

converting strings, 1161

debugging, 1161–1163

defined, 1126

escape conventions, 1201–1209

examples, 1141–1146

formatting reply text, 59

functionality, 52–55, 777, 1126–1128

functions and, 1155

generating tables, 1146–1149

Hello World program, 1183–1192

installing, 1142–1145

laying out forms with tables, 1157–1163

model extensions, 1182

name conventions, 1143

passing parameters in hidden form fields,

1172

passing parameters in URLs, 1170–1172

permissions, 1215

programming suggestions, 68

query strings, 57–59

refactoring code, 1192–1201

running, 1130–1134

saving state information in, 1174–1183

text decoding issues, 929

urllib module and, 57–59

using cookies in, 1179

web servers and, 55–57

writing, 1128–1130

Checkbutton widget class

command option, 458

functionality, 411, 457–461

variables and, 460–461

child process

defined, 179

exiting from, 807

spawning, 184

chmod command, 16, 54, 1140

class instances

persistence and, 1303

pickling, 1313

storing in shelves, 1318–1320

class object callback handlers, 392

classes

adding behavior, 29

adding inheritance, 29

adding persistence, 34–36

alternative, 32

C language and, 1535–1538

changing for objects, 1320

container, 408–410

customizing widgets with, 400–403

moving graphs to, 1393–1395

programming considerations, 27–29

recoding with, 638–639

refactoring scripts with, 888–892

Index | 1559

Do

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