Hard coded int vs variable int produce different slicing results in brain object

[pmdaly]

Slicing a brain object with an int variable produces an empty brain object (no elecs, no data).
Slicing a brain object with an int variable wrapped in a list returns the correct brain object.
Slicing a brain object with an int returns the correct brain object.

get_item method calls get_slice
https://github.com/ContextLab/supereeg/blob/master/supereeg/brain.py#L325

which seems to wrap the int in a list

the left pane shows a debugging breakpoint ("import ipdb; ipdb.set_trace()") but on the right pane you can see when the slicing is run, it doesn't trigger the breakpoint so it must be bypassing the method