外部代码与元数据不兼容？

Question

如果我对外部代码组件和显式组件使用元数据的相同设置，外部代码组件似乎会失败。下面的代码具有这两个组件。因为没有错误，如果我注释掉显式组件部分，我会收到错误消息：

comp = GFWrapper(DVLO=np.array(DVLIST))

TypeError: init() 得到了一个意外的关键字参数 'DVLO'

import numpy as np
import json  as js
import re,sys,subprocess,os
from openmdao.api import Problem, Group, IndepVarComp
from openmdao.api import  ScipyOptimizeDriver 
from openmdao.api import ExternalCode

class GFWrapper(ExternalCode):
    def initialize(self):
        self.metadata.declare('DVLO', types=np.ndarray)
    def setup(self):
        DVLO = self.metadata['DVLO']      
        for dv in DVLO:
            self.add_input(dv)
        self.add_output('OBJECTIVE')

        self.input_file  = 'GFWrapper_input.dat'
        self.output_file = 'GFWrapper_output.dat'
        self.options['external_input_files'] = [self.input_file,]
        self.options['external_output_files'] = [self.output_file,]

        self.options['command'] = [
            'python', 'run.py', self.input_file, self.output_file
        ]

        #self.declare_partials(of='*', wrt='*', method='fd')
        for dv in DVLO:
            self.declare_partials(of='OBJECTIVE', wrt=dv, method='fd')

    def compute(self, inputs, outputs):
        DVLO = self.metadata['DVLO']      

        # generate the input file for the  external code
        outF = open(self.input_file, "w")
        for dv in DVLO:
          outF.write(inputs[dv])
          print(dv,inputs[dv])
          outF.write("\n")
        outF.close()         

        # the parent compute function actually runs the external code
        super(GFWrapper, self).compute(inputs, outputs)
        # parse the output file from the external code
        file_contents=np.loadtxt(self.output_file)

        outputs['OBJECTIVE']          = file_contents[0]

from openmdao.api import ExplicitComponent
#
class GFWrapper(ExplicitComponent):
    def initialize(self):
        self.metadata.declare('DVLO', types=np.ndarray)
    def setup(self):
        DVLO = self.metadata['DVLO']      
        for dv in DVLO:
            self.add_input(dv)
        self.add_output('OBJECTIVE')

        #self.declare_partials(of='*', wrt='*', method='fd')
        for dv in DVLO:
            self.declare_partials(of='OBJECTIVE', wrt=dv, method='fd')
    def compute(self, inputs, outputs):
        DVLO = self.metadata['DVLO']  

        powetemp = 0
        for dv in DVLO:
            powetemp += inputs[dv]

        outputs['OBJECTIVE'] = powetemp        
#

DVLIST=['DV1','DV2']
DVMIN =[2,11] 
DVMAX =[3,12]
InitDVVal=[3,5]
nr_of_desvar=len(DVLIST)
top = Problem()
top.model = model = Group() 
" Introduce independent variables later will be design variables (optimization parameters) "
inputs_comp = IndepVarComp()
for i in range(nr_of_desvar):
    inputs_comp.add_output(DVLIST[i],InitDVVal[i]) 

" Add components/subsystems to the Group-model- "
model.add_subsystem('inputs_comp', inputs_comp)
comp = GFWrapper(DVLO=np.array(DVLIST))
model.add_subsystem('GFWrapper', comp)

Answer 1

这是 OpenMDAO 2.2 版中的错误。发生错误是因为我们没有在 ExternalCode 的 init 语句中包含 **kwargs。我们打算在 V2.3 中修复此问题，但与此同时，您可以通过添加这样的 init 语句来解决您的 GFWrapper 组件问题：

class GFWrapper(ExternalCode): 
    def __init__(self, **kwargs):
        super(GFWrapper, self).__init__()
        self.metadata.update(kwargs)

外部代码与元数据不兼容？

External code incompatibility with metadata?

openmdao