Thanks. That was simple enough and works fine.
Duane
On Saturday, October 26, 2013 10:07:11 PM UTC-5, Aaron Meurer wrote:
>
> Or I guess you don't really need to copy to_str. You can just use the
> existing one with a .replace('e', 'E').
>
> Aaron Meurer
>
> On Sat, Oct 26, 2013 at 7:39 PM, Aaron Meurer
> <[email protected]<javascript:>>
> wrote:
> > It looks like SymPy uses mpmath's to_str() to print Floats, which has
> > the lowercase e hard-coded in.
> >
> > The best way then will be to subclass StrPrinter and override
> > _print_Float. You can use the exact same version as the one that's
> > already there, except you'll need to replace to_str with your own
> > version, which again can be exactly the same as the one in mpmath
> > except using 'E' instead of 'e' everywhere. There's no direct option
> > to do this from the API, but since the printing system is completely
> > extensible, and it's all open source, you can do what you want with
> > little work.
> >
> > Aaron Meurer
> >
> > On Sat, Oct 26, 2013 at 4:21 PM, Duane Nykamp
> > <[email protected]<javascript:>>
> wrote:
> >> I'm writing a sympy expression to a javascript snippet in an html page
> that
> >> is then interpreted by Geogebra to set parameters in an embedded
> applet.
> >> I'm just using the string printer, as I'm not having sympy actually
> output
> >> javascript code, just the mathematical expression like "3x**2+2."
> >>
> >> Unfortunately, Geogebra does not interpret "3e-5" as "0.00005" but
> instead
> >> as the constant "3e" minus 5. It will, however, interpret "3E-5" as
> >> "0.00005".
> >>
> >> Is there an easy way to get sympy to output a float using scientific
> >> notation with a capital E? For single numbers, I can just use
> >>
> >> "%E" % expression
> >>
> >> to format it in that notation. But if expression=S("3e-17*x+1"), then
> this
> >> syntax does work, because Add cannot be converted to a float.
> >>
> >> I suppose could try to figure out how to use re.sub to replace the "e"
> with
> >> "E" after printing and before writing to the html page, but I thought
> there
> >> might be a more elegant solution.
> >>
> >> Duane
> >>
> >> --
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