OpenMDAO 1.x.x: 运行嵌套在非根组中的 SubProblem 问题导致错误

Question

将子问题添加到一个组时，该组本身已添加到另一个组，发生错误（Python3，OpenMDAO 1.7.3）。我通过重载 SubProblem 的 _get_relname_map(self, parent_proms) 方法解决了这个问题。仅 pkey = '.'.join((self.name, key)) 更改为 pkey = '.'.join((self.pathname, key)):

from openmdao.api import Problem, Group, Component, IndepVarComp, ExecComp, \
                         ScipyOptimizer, SubProblem
from collections import OrderedDict


class MySubProblem(SubProblem):

    def __init__(self, problem, params=(), unknowns=()):
        super().__init__(problem, params, unknowns)

    def _get_relname_map(self, parent_proms):
        umap = OrderedDict()
        for key in self._prob_unknowns:
            pkey = '.'.join((self.pathname, key))  # self.name -> self.pathname
            if pkey in parent_proms:
                umap[parent_proms[pkey]] = key
        return umap


def setup_sub():
    # create subproblem example
    sub = Problem(root=Group())

    sub.root.add('indep', IndepVarComp([
        ('x', 0.0), ('y', 2.0)]))

    # here's the actual function we're minimizing
    sub.root.add("comp", ExecComp("fx = cos(x)-y"))

    sub.driver = ScipyOptimizer()
    sub.driver.options['optimizer'] = 'COBYLA'
    sub.driver.add_desvar("indep.x", lower=-3, upper=3)
    sub.driver.add_objective("comp.fx")

    sub.root.connect("indep.x", "comp.x")
    sub.root.connect("indep.y", "comp.y")
    return sub

###
### Subproblem added to 'root'-Group -> working
prob0 = Problem(root=Group())

sp = prob0.root.add(
    "subprob",
    MySubProblem(
        setup_sub(),
        params=['indep.x', 'indep.y'],
        unknowns=['comp.fx']))

prob0.setup(check=False)
prob0.run()
print("prob0 done")

###
### Subproblem added to Group which is added to 'root'-Group -> not working
prob1 = Problem(root=Group())
prob1.root.add('main', Group())

sp = prob1.root.main.add(
    "subprob",
    MySubProblem(
        setup_sub(),
        params=['indep.x', 'indep.y'],
        unknowns=['comp.fx']))

prob1.setup(check=False)
prob1.run()
print("prob1 done")

上面的示例有效，但是当您在 MySubProblem 中注释 _get_relname_map 定义时，会在 prob1.run().

时引发错误

我现在的问题是：是否有任何理由使用 self.name 而不是 self.pathname？我的解决方案会导致任何其他问题吗？

非常感谢！

此致，杰罗姆

Answer 1

OpenMDAO 1.X 不再受到积极支持，无论如何，子问题始终是其中的一个实验性功能。如果您的修复对您有用，那应该没问题。

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