Always initialize mass and rhs attributes of InstationaryModel #1137
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ftalbrecht
approved these changes
Oct 28, 2020
| U = self.time_stepper.solve(operator=self.operator, | ||
| rhs=None if isinstance(self.rhs, ZeroOperator) else self.rhs, | ||
| initial_data=U0, | ||
| mass=None if isinstance(self.mass, IdentityOperator) else self.mass, |
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Would it not be nicer to not have the check here and instead extend the check/switch in the timestepper? It already checks for None and could also check for IdentityOperator or ZeroOperator, respectively.
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Yeah, maybe, but I didn't want to touch the time steppers in this pr.
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When
InstationaryModelis instantiated withmass=Noneorrhs=None, this PR causes corresponding attributes to be initialized with an appropriateIdentityOperatororZeroOperator. In particular, this is in agreement with the behavior ofLTIModel.Also see #1121.