Python Programming

As mentioned, a clear use case for tuples is to represent vectors, for example a coordinate.

You might have found it tedious to keep track of two separate variables row and col in your robot project.

Let us group these two variables together and simply call them position (or coords if you prefer). A position is now a tuple with two elements, i.e. position = (row, col).

Now, try to refactor your project so that you use tuples instead of two separate row and col variables to represent the position of a robot (as well as the target cells containing the Ribena). If any of your functions has both the input parameters row and col, try to take in only a single tuple called position.

You may find that your code becomes more readable at a high-level, since you have abstracted row and col to simply position. In exchange, however, your code might feel less readable at a lower level. For example, row and col were actually more self-explanatory than position[0] and position[1]! There are ways to make this more readable, but we will worry about that in future lessons! For now, the best way to make this more readable is assign row = position[0] and col = position[1] when you need to and use the more self-explanatory row and col instead. You can also use row, col = position or (row, col) = position which automatically unpacks the elements in position into the row and col variables respectively.

Make sure that your code still works correctly after refactoring. Your output should still stay the same.

Remember to commit your changes to your repo when you are done!