The New Year is coming and you've decided to decorate your home. But simple lights and Christmas decorations are so boring, so you have figured that you can use your programing skills and create something really cool and original. Your task is to create the class Lamp() and method light() which will make the lamp glow with one of the four colors in the sequence - (‘Green’, ‘Red’, ‘Blue’, ‘Yellow’). When the light() method is used for the first time, the color should be 'Green', the second time - 'Red' and so on. If the current color is 'Yellow', the next color should be 'Green' and so on. In this mission you can use the State design pattern. It's highly useful in the situations where object should change its behaviour depending on the internal state.
lamp_1 = Lamp() lamp_2 = Lamp() lamp_1.light() #Green lamp_1.light() #Red lamp_2.light() #Green lamp_1.light() == "Blue" lamp_1.light() == "Yellow" lamp_1.light() == "Green" lamp_2.light() == "Red" lamp_2.light() == "Blue"
Input: A few strings indicating the number of times the lamp is being turned on.
Output: The color of the lamp.
How it is used: To implement objects with mutable behavior.
Precondition: 4 colors: Green, Red, Blue, Yellow.
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin --ff
checkio install-plugin --chromium