On Wed, Apr 6, 2016 at 4:09 PM, Nathan Hayden <[email protected]>
wrote:
> Hi, I'm new to SymPy, but I'm using it to do some simple things already.
>
> I'm wondering, can I feed SymPy an expression and get a tree
> representation back showing me the order of operations used to evaluate the
> expression? I know this is all handled under the hood, but I don't know if
> it's exposed.
>
>
> For example, for the expression: 4 * 5 + 6 * (1 + 2)
>
> I'd like to get something like:
>
> +
> / \
> * *
> / \ / \
> 4 5 6 +
> / \
> 1 2
>
> Is this a thing?
>
from sympy.printing.tree import print_tree
from sympy import S
print_tree(S(' 4 * 5 + 6 * (1 + 2)', evaluate=False))
I'm not sure there's a way to make it print like you want, but you should
be able to whip something up following this:
http://docs.sympy.org/latest/tutorial/manipulation.html
(particularly the bits toward the bottom).
-Nathan
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