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`exec`-based routine crashes app upon migration from 3.4.3 to python 3.5.2.

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  `exec`-based routine crashes app upon migration from 3.4.3 to python 3.5.2. Enjoys Math <enjoysmath@gmail.com> - 2016-07-28 08:47 -0700
    Re: `exec`-based routine crashes app upon migration from 3.4.3 to python 3.5.2. Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-08-01 18:45 -0700
      Re: `exec`-based routine crashes app upon migration from 3.4.3 to python 3.5.2. eryk sun <eryksun@gmail.com> - 2016-08-02 04:48 +0000

#111988 — `exec`-based routine crashes app upon migration from 3.4.3 to python 3.5.2.

I've manually set breakpoints and traced this app crash back to this
function:

    def loadLSobjsOfType(self, objType, listJ):
        if listJ != None:
            for objJ in listJ:
                _locals = locals()
                exec('obj = ' + objType + '(self)', None, _locals)
                obj = _locals['obj']
                obj.loadJson(objJ)
                self.addLSobjOfType(objType, obj)

when breakpoints are set on `obj=_locals['obj']` my wingware debugger kicks
in and throws a KeyError exeption.

So what's the proper way to get the return value of an exec call when there
is one?

Thanks.

Regards,
EM

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#112200

On Friday, July 29, 2016 at 6:25:51 AM UTC+12, Enjoys Math wrote:

>                 exec('obj = ' + objType + '(self)', None, _locals)
>                 obj = _locals['obj']

Why? Why not just

    obj = objType(self)

?

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#112203

On Tue, Aug 2, 2016 at 1:45 AM, Lawrence D’Oliveiro
<lawrencedo99@gmail.com> wrote:
> On Friday, July 29, 2016 at 6:25:51 AM UTC+12, Enjoys Math wrote:
>
>>                 exec('obj = ' + objType + '(self)', None, _locals)
>>                 obj = _locals['obj']
>
> Why? Why not just
>
>     obj = objType(self)

I think you meant to use `globals()[objType](self)`, as was already
suggested by Chris Angelico. The value of objType appears to be the
type's name, maybe from marshaled data.

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