play button adding - button class deactivating drawing hiding the mouse cursor resetting the game starting the game reviewing scoring displaying the level - displaying the number of ships - displaying the score increasing point values making scoring system - rounding and formatting the score scoreboard class scoring all hits tracking the high score tracking the score ship adjusting speed - continuous movement - finding an image limiting range ship class alien py - aliens py - americas py amusement_park py - and keyword - api (application programming interface) call processing response - requesting data using summarizing results of for hacker news - rate limits apostrophe py index append(method - application programming interface see api (application programming interfacearguments - see also functions arithmetic as keyword assert methods - asterisk (*operator attributes accessing default values modifying values - banned_users py bash bicycles py - birthday py bitmap bmpimage files body of function of an html file boolean values bootstrap built-in functions calling functions - methods camelcaps car py - car py module - - cars py - child classes see also classesinheritance cities py classes - attributes accessing default values modifying values - creating -