L

label; see QLabel lambda statement, 61-62, 134,453 last() (QSqlQuery),450 lastError()

QSqlDatabase, 446, 450, 459, 465 QSqlQuery, 449 lastIndexOf() (QString), 234 Latin1 encoding, 20 layout managers, 118-120, 123, 144-146, 145, 150, 209-210, 212, 213-215, 270-271, 332 layout() (QWidget), 277 layout policies, 270-271

left() (QString), 234, 306 len(), 20,25, 33, 36, 38, 96,237, 503

Length example class (length) ,

86-91 length() (QString), 388 level of detail, 374 licensing, 3

lifetime, of PyQt objects, 287 line editor; see QLineEdit line width; see pen width lineEdit() (QAbstractSpinBox), 327 list comprehensions, 53-54, 96-97 list type, 31-35,33, 38, 93

list type (cont.)

+ concatenation operator, 33

extend(),33

generating, 54

indexing, 32

iterating, 50

slicing, 32

sort(), 33, 53, 63, 95, 239 title(), 24 list widget; see QListWidget listen() (QTcpServer), 529 literals integer, 17 string, 20 live dialogs, 159-162 loading files, 184,229,240-248,

249-256,256-265 local scope, 55 local variables, 87 locale; see QLocale and

QString.arg() localeAwareCompare() (QString),416, 434

lock() (QMutex), 553,554 lockForRead() (QReadWriteLock), 541,

542, 543, 548, 550, 551, 556 lockForWrite() (QReadWriteLock), 542,

543, 556

logical coordinates; see window coordinates logical operators, 47 long(), 40

long type, 16-17,231, 241

%i and %d format specifiers, 26 see also int type loops; see for statement and while statement deeply nested, 69

low-level communication mechanisms; see events lower() (str/unicode), 25, 238 lrelease application, 207, 513, 518 __lt__() (<), 81, 82, 432

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