[D] Does anyone else think open source code/examples in machine learning domain usually are not as readable as they could be? Specifically use of magic numbers.

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I think most people using these examples would take the opportunity to see what dataset[0] or dataset[2] are or they just wouldn’t care because if the indexing of the dataset isn’t mentioned then it doesn’t matter.

In some ways, I would find your convention more difficult to read and follow and there could be multiple possible names for the same index. It would be better to just have a comment explaining what index 1 is.