Numpy-f2py troubles

Andrea Gavana

Hello NG,

I am using the latest Numpy release 1.0rc2 which includes F2PY. I
have switched to Python 2.5 so this is the only alternative I have
(IIUC). With Python 2.4, I was able to build a very simple fortran
extension without problems.

My extension contains 4 subroutines that scan a file and do simple operations.
Now, attempting to run the second subroutine as:

dprops, dwgnames, dunits = readsmspec.read smspec(smspec, dimens)

Prompt a ValueError from Python:

File "D:\MyProjects\ Carolina\MainPa nel.py", line 894, in ReadSMSPECFile
dprops, dwgnames, dunits = readsmspec.read smspec(smspec, dimens)
ValueError: data type must provide an itemsize

?!? I have never seen anything like that and googling around didn't
give me any answer. The function accepts two inputs:

- smspec: a filename, maximum 1000 characters long
- dimens: an integer

and returns 3 array of chars, each of them with size (8, dimens). Does
anyone know what I may be doing wrong?

Thank you very much for every pointer.
--
Andrea.

"Imaginatio n Is The Only Weapon In The War Against Reality."
http://xoomer.virgilio.it/infinity77/

Oct 17 '06 #1

Subscribe Reply

2796

bernhard.voigt

Hi Andrea,

you should post this to the numpy list:
nu************* *@lists.sourcef orge.net

Cheers! Bernhard

Andrea Gavana schrieb:

Hello NG,

I am using the latest Numpy release 1.0rc2 which includes F2PY. I
have switched to Python 2.5 so this is the only alternative I have
(IIUC). With Python 2.4, I was able to build a very simple fortran
extension without problems.

My extension contains 4 subroutines that scan a file and do simple operations.
Now, attempting to run the second subroutine as:

dprops, dwgnames, dunits = readsmspec.read smspec(smspec, dimens)

Prompt a ValueError from Python:

File "D:\MyProjects\ Carolina\MainPa nel.py", line 894, in ReadSMSPECFile
dprops, dwgnames, dunits = readsmspec.read smspec(smspec, dimens)
ValueError: data type must provide an itemsize

?!? I have never seen anything like that and googling around didn't
give me any answer. The function accepts two inputs:

- smspec: a filename, maximum 1000 characters long
- dimens: an integer

and returns 3 array of chars, each of them with size (8, dimens). Does
anyone know what I may be doing wrong?

Thank you very much for every pointer.
--
Andrea.

"Imaginatio n Is The Only Weapon In The War Against Reality."
http://xoomer.virgilio.it/infinity77/

Oct 18 '06 #2

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