Manually clean up PETSc objects

usnistgov / fipy

FiPy is a Finite Volume PDE solver written in Python

http://pages.nist.gov/fipy/en/latest

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Closed guyer closed 1 year ago

guyer commented 1 year ago

Garbage collection works differently (worse) in petsc4py 3.18.3 than in 3.17.4.

Fixes #896