Question

Is there a way (using eval or whatever) to evaluate eagerly boolean expressions in python?

Let’s see this:

>>> x = 3
>>> 5 < x < y
False

Yikes! That’s very nice, because this will be false regardless of y‘s value. The thing is, y can be even undefined, and I’d like to get that exception. How can I get python to evaluate all expressions even if it knows the result beforehand?

Hope I made myself clear! Thanks,
Manuel

Edit: Please bear in mind that the expression must not be modified, just the evaluation technique.

Answer 1

all([5 < x, x < y])