[petsc-users] return -1 instead of raising an error in ao.app2petsc

[Xin Zhao]

Dear all,

Assume that I want to convert an indices in application order into petsc
order.
But I don't know the indices in application is in range.

Say
I call
ao = PETSc.AO().createMapping([4,2,3])

then
ao.app2petsc([2,5,3])
will raise an error.

is there any way to make return value to [1,-1,2] instead of raising an
error?


Or there is any way I can handle this error to make it work?

Best,
Xin
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