For the last two weeks, many of my students have run into problems when
using the underscore in SMC.
As I understand it, Python automatically writes the last output to _, so we
might compute a derivative and then do show(_) to make it look nicer. Or
perhaps we do a calculation and then do N(_) to convert to a decimal.
Anyway, for about two weeks both of these have failed. show(_) produces a
strange list of SMC related words, while N(_) produces an error.
Everything works fine after I do reset('_'); however, it has been necessary
to do this reset each time my students use SMC.
This issue is pretty widespread, but I don't think all my students
experience it (not sure about this).
Has anyone else run into this?
Aaron
P.S. Of course, it's possible to avoid using the underscore entirely. But
solve(derivative(x^2+y^2==25,x),derivative(y,x)) intimidates my students
enough as it is without adding a show at the front (and another set of
parentheses).
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