I hope this isn't old news. I just figured out how to use "lambda" as
a variable without conflicting with the Python keyword. It's very
simple -- all you need to do is put an underscore at the end of the
name:
lambda_ = var("lambda")
This is the syntax for adding a subscript, but ... no subscript. The
result renders properly and is in every other way a normal variable. I
was creating a renderable version of the standard Planck blackbody
equation and discovered the "lambda problem". This solves it. It
renders correctly in latex, with no artifact from the underscore.
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