Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] race condition Radiobutton widget (Tk) raise statement 2nd raising an exception 2nd random module Random Sequence iterator example range symbol ( - ) range( ) built-in function 2nd 3rd 4th 5th ranges ( - ) 2nd rapid prototyping raw strings 2nd 3rd 4th raw_input( ) built-in function 2nd 3rd 4th RDBMS (relational database systems) 2nd 3rd re module 2nd read( ) built-in method 2nd readinto( ) method 2nd readline( ) built-in method 2nd 3rd readlines( ) built-in method 2nd realm reason (exceptions) rebinding receiving e-mail recursion redirecting output reduce( ) built-in function 2nd 3rd refactoring refcount reference 2nd 3rd reference counting 2nd 3rd 4th reflection, definition of regular expression engine 2nd regular expressions (REs) about and "greedy" operators any single character ( . ) 2nd ASCII characters beginning/end of strings character classes ( [ ] ), creating 2nd compiling example finding every occurrence grouping 2nd match objects/group(s) methods match( ) 2nd matching more than one pattern, with alternation ( | ) matching more than one string matching strings matching word boundaries multiple occurrence/repetition using closure operators negation ( ^ ) parentheses ( ( ) ) ranges ( - ), denoting raw strings 2nd re module 2nd repetition 2nd search( ) re module searching vs. matching 2nd 3rd searching/replacing special characters/symbols 2nd 3rd splitting on delimiting pattern with strings sub( )/ subn( ) word boundaries regular integers relational database systems [See RDBMS (relational database systems).] relative complement ( - ) operator [See difference ( - ) operator.] relative import (packages) reload( ) built-in function remove( ) method 2nd 3rd removing dictionary elements/dictionaries lists/list elements numbers set members/sets single object reference strings/characters tuple elements/tuples repetition lists regular expressions 2nd special characters/grouping and strings tuples repetition ( * ) sequence operator repr( ) built-in function REs [See regular expressions (REs).] restricted execution retention update ( &= ) operator return value(s) 2nd 3rd 4th reverse quote operator ( ' ' ) reversed( ) built-in function 2nd 3rd 4th 5th 6th 7th Rexx robustness root window round( ) built-in function RoundFloat2 customization example rows Ruby 2nd running Python as a script from command line code examples in an IDE interactive interpreter from command line runtime errors runtime generation/execution of code RuntimeError exception |