Undefined Variables in dataset preparation code

[Sukanyasingh3]

Hey, in the code for preparing the brain tumor dataset, there are a few corrections that I noticed:

• undefined Variable border: In the loop where you are iterating over the files, you are appending to border without defining it earlier.
• Coordinate (coord) Undefined: It seems like you are trying to append coord to borders, but coord is not defined in the loop.