Lab 1 PyTorch Sequential example prints wrong variable

[yuvalshayel]

The notebook prints y instead of model_output in the Sequential example,
which makes outputs look identical. Likely a bug.

[ngarciafle]

It's definitely an error, the outputs are identical because python is looking into the memory and printing the last output called y.

The best change is to change model_output to y, to follow the semantic used.