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Class or object attribute?
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
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The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, compare your working with the solution.
Plan. colour is a class attribute. A write through an object makes an object attribute.
First line:
a.colour = "red"makes a new attribute ona. It does not change the class.a.colourisred.b.colourfinds nothing onb, so it uses the class value,white.Light.colouriswhite.
Second line:
Light.colour = "blue"changes the class attribute.a.colouris stillred, becauseahas its own attribute that hides the class one.b.colourisblue, becausebuses the class value, which changed.Light.colourisblue.
Answer: red white white and then red blue blue.
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