Python Programming for Raspberry Pi, Sams Teach Yourself in 24 Hours

dot character as pattern for regular expressions, 325 - 326

double quotes (“), print function syntax, 72 - 73

downloading Raspbian, 20

dpi (dots per inch), 494

drawing shapes, 404 - 407

duty cycle, 541

dynamic webpages, 476 - 480

E

ehlo() method, 429

elements
adding to sets, 188 - 189
set difference, 190 - 191
set intersection, 190
set membership, 189
set union, 189 - 190
symmetric set difference, 191

elif statement, 120 - 121

else clause (while loops), 145

else statement, 118 - 120

email servers, 423 - 432

Linux, modular email environment, 425 - 427

remote email servers, 428

RFC 2822 email standard, 429

sending messages, 430 - 432

smtplib module, 427 - 429

entering commands at command line, 31 - 33

Entry widget, 397 - 398

equations

complex number math, 105 - 106

floating-point accuracy in calculations, 102

Fraction object, 103 - 105

numbers, displaying, 102 - 103

variables, 100 - 101

errors
generic exception handling, 350
runtime error exceptions, 340 - 342
syntactical error exceptions, 337 - 339

escape sequences

line feeds, adding, 75 - 76

output, controlling, 75 - 76