objects pattern matching - buttoncommand objectscommand pattern command objects building - calling - pep standards pil (pillow image librarydisplaying images using - containers plotstategy classstrategy pattern - mediators and - pluggable adapters copy-on write objects point classtemplate pattern flyweight pattern polymorphism proxy pattern prefix/suffix removalstrings database objectsfacade pattern print function - over inheritance print verbinterpreter pattern observer pattern - printing employee trees - color changing program example - privileged accessiterators - consequences of program commandsstrategy pattern - github programs programminghelp systems - messages to the media properties notifications prototype pattern odbc (open database connectivity) cloning - openingfiles consequences of or operator github programs operators using - and operator proxy pattern arithmetic operators comparing related patterns - assignment (=operator copy-on write objects bitwise operators - github programs comparison operators - pil complement operator - displaying images compound operatorsspacing using - is equal to (==operator left/right shift operators or operator threads loading images - logging from in strings pycharm pymysql library python pack layouts - - arrayslists parsinginterpreter pattern - classes