[Swig-user] SWIG module causes errors when imported with IPython

[John P. <joh...@st...>]

Hi all

I have a SWIG module fails to import on in IPython on Python 2.4.2 on
Windows XP. But it works fine on Linux, and also works fine on Windows
with the plain vanilla Python console.

The funny thing is that the import error that IPython shows is different
depending on the version of SWIG that I use to build  my module.

With SWIG 1.3.24, I get an error (see below) "'module' object has no
attribute 'delete_exception'". But with SWIG 1.3.28 and 1.3.31 I get an
error "'module' object has no attribute 'delete_steam_pT'". I am using
MinGW GCC 3.4.5, but I have also tried with GCC 3.4.2 to no avail.

As it looks like a version-sensitive thing with SWIG, I wonder if anyone
here might have seen this problem or know how to fix it?

Again note that this seems to work perfectly under Linux; this looks
like only a Windows problem.

Cheers
JP

PS the code is at http://freesteam.sf.net/


---- 8< --error with SWIG 1.3.24---- 8< ----

In [1]: import freesteam
---------------------------------------------------------------------------
exceptions.AttributeError                            Traceback (most
recent call
 last)

C:\Documents and Settings\john\<ipython console>

C:\Python24\lib\site-packages\freesteam.py
     37
     38
---> 39 class exception:
     40     __swig_setmethods__ = {}
     41     __setattr__ = lambda self, name, value: _swig_setattr(self,
exceptio
n, name, value)

C:\Python24\lib\site-packages\freesteam.py in exception()
     44     def __repr__(self):
     45         return "<%s.%s; proxy of C++ std::exception instance at
%s>" % (
self.__class__.__module__, self.__class__.__name__, self.this,)
---> 46     def __del__(self, destroy=_freesteam.delete_exception):
     47         try:
     48             if self.thisown: destroy(self)

AttributeError: 'module' object has no attribute 'delete_exception'

In [2]:

---- 8< --- error with SWIG 1.3.31 ---- 8< ----

In [2]: import freesteam
---------------------------------------------------------------------------
exceptions.AttributeError                            Traceback (most
recent call
 last)

C:\Documents and Settings\john\<ipython console>

C:\Python24\lib\site-packages\freesteam.py
    141 steam_ps_swigregister(steam_ps)
    142
--> 143 class steam_pT(_object):
    144     __swig_setmethods__ = {}
    145     __setattr__ = lambda self, name, value: _swig_setattr(self,
steam_pT
, name, value)

C:\Python24\lib\site-packages\freesteam.py in steam_pT()
    151         try: self.this.append(this)
    152         except: self.this = this
--> 153     __swig_destroy__ = _freesteam.delete_steam_pT
    154     __del__ = lambda self : None;
    155     def solve(*args): return _freesteam.steam_pT_solve(*args)

AttributeError: 'module' object has no attribute 'delete_steam_pT'

In [3]:


-- 
John Pye
Department of Mechanical and Manufacturing Engineering
University of New South Wales, Sydney, Australia
http://pye.dyndns.org/