[IPython-user] Error when importing module into ipython

Fernando Perez fperez.net@gmail....
Tue Apr 3 00:35:57 CDT 2007

Hi John,

On 4/2/07, John Pye <john.pye@student.unsw.edu.au> wrote:
> Hi all
> I have a python module that I've developed. It's C++ code wrapped with
> SWIG to provide steam properties for use in engineering calculations.
> But I've just noticed that it won't import correctly under IPython 0.7.3
> on Python 2.4.2 on Windows XP. I get an error message like shown below.
> The funny thing is that I can import the package fine under the standard
> vanilla python console, and there are no errors (even when I run type
> 'S = freesteam.steam_pT(); del S', which the following would suggest
> could have failed). And it imports fine under IPython 0.7.2 on Linux
> as well.
> Any suggestions on what I could be doing wrong here?

No idea, it looks very very strange.  A few things you can do:

- type %xmode verbose.  This will give you more verbose tracebacks,
with information on the failing modules.  That might give you a clue.

- After the error, type %debug.  This will drop you into the
interactive debugger right where the crash occurred.  You can try then
looking at the _freesteam object to study it and see if it looks OK.
You might be picking one from the wrong directory, I don't know.

Good luck,


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