Puzzled by FiPy's use of "=="

Robert Kern robert.kern at gmail.com
Mon Mar 26 14:16:07 CEST 2012

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:


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

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