18     def function(self, ts, t, u, du, F):  argument
24     def jacobian(self, ts, t, u, du, a, J, P):  argument
44     def create(self, ts, *args):  argument
48     def destroy(self, ts, *args):  argument
52     def setFromOptions(self, ts, *args):  argument
55     def setUp(self, ts, *args):  argument
56         self._log('setUp', ts, *args)
57         self.vec_update = ts.getSolution().duplicate()
59     def reset(self, ts, *args):  argument
60         self._log('reset', ts, *args)
62     def solveStep(self, ts, t, u, *args):  argument
63         self._log('solveStep', ts, t, u, *args)
64         ts.snes.solve(None, u)
66     def adaptStep(self, ts, t, u, *args):  argument
67         self._log('adaptStep', ts, t, u, *args)
68         return (ts.getTimeStep(), True)
73         self.ts = PETSc.TS()
74         self.ts.createPython(MyTS(), comm=PETSc.COMM_SELF)
76         self.ts.setExactFinalTime(eft)
85         self.ts.destroy()
86         self.ts = None
91         ctx = self.ts.getPythonContext()
93         self.assertTrue(self.ts.getPythonType() == pytype)
96         ts = self.ts
97         ts.setProblemType(ts.ProblemType.NONLINEAR)
99         J = PETSc.Mat().create(ts.comm)
105         ts.setAppCtx(ode)
106         ts.setIFunction(ode.function, f)
107         ts.setIJacobian(ode.jacobian, J, J)
108         ts.snes.ksp.pc.setType('none')
112         ts.setTime(T0)
113         ts.setTimeStep(dT)
114         ts.setMaxTime(T)
115         ts.setMaxSteps(nT)
116         ts.setFromOptions()
118         ts.solve(u)
124         ctx = self.ts.getPythonContext()
125         ncalls = self.nsolve * ts.step_number
130         dct = self.ts.getDict()
137         ts = self.ts
138         ts.setProblemType(ts.ProblemType.NONLINEAR)
140         J = PETSc.Mat().create(ts.comm)
147         ts.setAppCtx(ode)
148         ts.setIFunction(ode.function, f)
149         ts.setIJacobian(ode.jacobian, J, J)
153         ts.setTime(T0)
154         ts.setTimeStep(dT)
155         ts.setMaxTime(T)
156         ts.setMaxSteps(nT)
157         ts.setFromOptions()
160         ts.setSolution(u)
161         ode.jacobian(ts, 0.0, u, u, 1.0, J, J)
162         ts.snes.setUseFD(True)
163         ts.solve(u)
167         self.ts.reset()
168         self.ts.setStepNumber(0)
170         self.ts.reset()
171         self.ts.setStepNumber(0)
173         self.ts.reset()
174         self.ts.setStepNumber(0)
176         self.ts.reset()
179         self.ts.setStepLimits(1.0, 2.0)
180         hmin, hmax = self.ts.getStepLimits()
185         return self.ts.getPythonContext()