Puzzled by FiPy's use of "=="

[André Roberge]

On Monday, 26 March 2012 09:16:07 UTC-3, Robert Kern  wrote:
> On 3/26/12 12:47 PM, André Roberge wrote:
> > In FiPy (a finite volume PDE solver), equations are "magically" set up as
> >
> > eqX = TransientTerm() == ExplicitDiffusionTerm(coeff=D)
> >
> > and solved via
> >
> > eqX.solve(...)
> >
> > How can eqX be anything than True or False?...  This must be via a redefinition of "==" but I can't see how that is done.  I did look at many of the source files, thinking that it must be via a redefinition of "__eq__" somewhere but with no luck.   Any pointers would be appreciated.
> 
> It's in the root base class Term:
> 
>    http://matforge.org/fipy/browser/trunk/fipy/terms/term.py#L374
> 

I thought I looked at terms.py ... but I must have missed that.  Thanks!

> -- 
> Robert Kern
> 
> "I have come to believe that the whole world is an enigma, a harmless enigma
>   that is made terrible by our own mad attempt to interpret it as though it had
>   an underlying truth."
>    -- Umberto Eco