n shelve access mode, 212
namespaces, 178
naming variables, 34–35
negative position numbers, 102–103
nested sequences
accessing elements in, 141–142
creating, 140–141
defined, 139
nested tuples, 143–144
nesting functions, 45
new lines, suppressing, 27–28
new-style classes, 249
New Window command (File menu), 11
newline character (n), 24–25, 204
next_block() function, 221–222, 224
next_level() method, 419
next_line() function, 221
No Vowels program example, 105–106
NONE value, 110, 320
not equal to (!=) operator, 59
not logical operator, 81
Not Saved dialog box, 12
n_repeats attribute, Animation class, 430
number sign symbol (#), 13
numbers
floating-point, 30–31, 50
integers, 30–31
mathematical operators, 31–32
negative position, 102–103
positive position, 101
random generation, 103–104
true division, 31
Word Problems program, 28–30
numeric keystrokes, 381