Jason Whitehorn has written a library for Python to control\/read the GPIO pins based on events. It means you can write code like:<\/p>\n
watch<\/span> :pin<\/span> =><\/span> 23<\/span> do<\/span>\n puts<\/span> \"<\/span>Pin changed from <\/span>#{<\/span>last_value<\/span>}<\/span> to <\/span>#{<\/span>value<\/span>}<\/span>\"<\/span><\/span>\nend<\/span>\n\n#Or\n<\/span>\nafter<\/span> :pin<\/span> =><\/span> 23<\/span>,<\/span> :goes<\/span> =><\/span> :high<\/span> do<\/span>\n puts<\/span> \"<\/span>Button pressed<\/span>\"<\/span><\/span>\nend<\/span><\/code><\/pre>\n… which is very intuitive and is an excellent way of doing it.<\/p>\n