[C++-sig] Trouble accessing custom object

[David Abrahams]

"Clarke, Ronald" <ron.clarke at hp.com> writes:

>     // ...and try calling printProperties() again, to see if the new
> image is printed
>     int nrunres = PyRun_SimpleString("imageIn.printProperties()\n"); 
>
>
> The address of pargsi looks reasonable, and the return code from the
> SetAttrString call is zero.
> However, PyRun_SimpleString fails with this error:
>
> Traceback (most recent call last):
>   File "<string>", line 1, in ?
> NameError: name 'imageIn' is not defined

There's no reason for the unqualified name "imageIn" to be looked up
in your filter module AFAICT.

I suggest:

    int nrunres = PyRun_SimpleString(
          const_cast<char*>(
             extract<char const*>(
                str("from %s import *; imageIn.printProperties()\n")  % sfilterName
             )
          )
    ); 

HTH,

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com