no problem i think what i asking like :
input_str="2x"
transformations = ... implicit_mult ...
expr = parse_expr (input_str, local_dict={"x":x},
transformations=transformations).subs("x", 4.0)
I think above is the approx replacement i looking for.
cheers
Daniel.
On Tuesday, 6 January 2026 at 14:24:39 UTC Oscar wrote:
> On Tue, 6 Jan 2026 at 14:15, Little Grey Men <[email protected]> wrote:
> >
> > OK I am able to see working the version with parse_expr with a local_dict
> > the previous sympify syntax used which failed with "x" was slightly more
> complex in that it also used a dict(subs).
> >
> > Should i be able to call parse_expr with the local_dict to declare x AND
> the dict(subs) to evaluate.
> > In such a case if it were valid, it would make sense the evaluate flag
> would be set to True.
> >
> > Does any of the above make sense ?
>
> It is too imprecise to understand. Show the actual code and explain
> very clearly what happens when you run the code and what it is that
> you want to happen.
>
> --
> Oscar
>
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