I have an expression, something as simple as |-1|, i.e. Abs(-1). I don't
want it to evaluate to its value, i.e. 1, for printing reasons. I tried:
parse_expr("Abs(-1)", evaluate=False)
But it gives me the evaluated expression anyway. In fact, I can't figure
out how to get the expression tree to just keep this Abs function with its
argument.
So if I want it to display |-1| but not its value, how would I go about
doing it? Thanks.
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