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from petsc4py.PETSc import TAO
from petsc4py.PETSc import Vec
from petsc4py.PETSc import Viewer
# A template class with the Python methods supported by TAOPYTHON
class TAOPythonProtocol:
def setFromOptions(self, tao: TAO):
"""Parse the command line options."""
...
def setUp(self, tao: TAO):
"""Set up the optimizer."""
...
def solve(self, tao):
"""Solve the optimisation problem.
Note:
Do not override if you want to rely on the default solve routine, using step, preStep and postStep.
"""
...
def step(self, tao: TAO, x: Vec, g: Vec, s: Vec):
"""Given current iterate x compute gradient g and step s."""
...
def preStep(self, tao: TAO):
"""Invoked before step."""
...
def postStep(self, tao: TAO):
"""Invoked after step."""
...
def view(self, tao: TAO, viewer: Viewer):
"""View the optimizer."""
...
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