Identifying expressions created with `evaluate=False`

[Kate MacInnis]

I think I know the answer already, but just to be sure, if I have several expression objects (mostly Add and Mul), some of which were created with `evaluate=False`, is there any way to tell which those are?

[Aaron Meurer]

What method were you thinking of?

As far as I can tell from the code, this information isn't saved on
the object. I think the only way to do it is to compare expr and
expr.func(*expr.args). That will tell you if something didn't
evaluate that would have. It won't tell you if evaluate=False was used
but wasn't really needed.

Aaron Meurer

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