During debugging I've seen many constructs like list(map(lambda i: torch.device('cuda:' + str(i)), gpus))

I'd propose to replace those by "regular" list comprehensions. So the above is equivalent to [torch.device('cuda:' + str(i)) for i in gpus]

This replacement can be automated via regexp replacement for (likely) almost all cases.

Reasoning: The nesting of parentheses and the inline

Support Series.median()

Currently, we do not have test for command-line options. It'd be nice to have one and have CI run it.
https://egison.readthedocs.io/en/latest/reference/command-line-options.html

Numpy has a way to rotate matrices by increments of 90 degrees using their rot90 method that uses transposes and flips.

There is a transpose method for Tensors, but no way of flipping the Tensor that I see.

Is there a way of properly rotating a Tensor/Dense currently, other than through manual iteration over the

The Scaladoc should be similar to numpy's API reference