calling C function from Python via f2py
Hello,
I am trying to use f2py to generate a wrapped C function that I can call from Python (passing arguments to and from). I have this almost working, but I receive trouble with "exp and pow" related to C and some "pos (2) error" with one of my passed variables. My f2py syntax is:
f2py c lm FFMCcalc.pyf FFMCcalc.c
Also, my 3 scripts are short and attached.
1. FFMCcalc.c, C function 2. FFMCcalc.pyf, wrapper file 3. test.py, short python code that calls C function
Any advice would greatly appreciated to get this working. thanks, Matt
in test.py change to
print FFMCcalc.FFMCcalc(T,H,W,ro,Fo)
As implied from the line
print FFMCcalc.FFMCcalc.__doc__
Nadav
Original Message From: numpydiscussionbounces@scipy.org on behalf of Matt Fearon Sent: Fri 21May10 21:55 To: numpydiscussion@scipy.org Subject: [Numpydiscussion] calling C function from Python via f2py
Hello,
I am trying to use f2py to generate a wrapped C function that I can call from Python (passing arguments to and from). I have this almost working, but I receive trouble with "exp and pow" related to C and some "pos (2) error" with one of my passed variables. My f2py syntax is:
f2py c lm FFMCcalc.pyf FFMCcalc.c
Also, my 3 scripts are short and attached.
1. FFMCcalc.c, C function 2. FFMCcalc.pyf, wrapper file 3. test.py, short python code that calls C function
Any advice would greatly appreciated to get this working. thanks, Matt
Nadav,
Thank you. I believe it is working now, as the pos(2) error is gone. However, though the error is gone, my return variable from the C function is not being updated as if the C code is not executing? Syntax to the call the C function from Python is the following:
FFMCcalc.FFMCcalc(T,H,W,ro,Fo)
Should this execute the C code?
thanks, Matt
On Sun, May 23, 2010 at 1:44 AM, Nadav Horesh nadavh@visionsense.com wrote:
in test.py change to
print FFMCcalc.FFMCcalc(T,H,W,ro,Fo)
As implied from the line
print FFMCcalc.FFMCcalc.__doc__
Nadav
Original Message From: numpydiscussionbounces@scipy.org on behalf of Matt Fearon Sent: Fri 21May10 21:55 To: numpydiscussion@scipy.org Subject: [Numpydiscussion] calling C function from Python via f2py
Hello,
I am trying to use f2py to generate a wrapped C function that I can call from Python (passing arguments to and from). I have this almost working, but I receive trouble with "exp and pow" related to C and some "pos (2) error" with one of my passed variables. My f2py syntax is:
f2py c lm FFMCcalc.pyf FFMCcalc.c
Also, my 3 scripts are short and attached.
 FFMCcalc.c, C function
 FFMCcalc.pyf, wrapper file
 test.py, short python code that calls C function
Any advice would greatly appreciated to get this working. thanks, Matt
NumPyDiscussion mailing list NumPyDiscussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpydiscussion
Sorry, can not figure it out, if you don't gen an answer on this list maybe you should address it on swig list. Personally I use cython for this purpose.
Nadav
Original Message From: numpydiscussionbounces@scipy.org on behalf of Matt Fearon Sent: Mon 24May10 15:43 To: Discussion of Numerical Python Subject: Re: [Numpydiscussion] calling C function from Python via f2py
Nadav,
Thank you. I believe it is working now, as the pos(2) error is gone. However, though the error is gone, my return variable from the C function is not being updated as if the C code is not executing? Syntax to the call the C function from Python is the following:
FFMCcalc.FFMCcalc(T,H,W,ro,Fo)
Should this execute the C code?
thanks, Matt
On Sun, May 23, 2010 at 1:44 AM, Nadav Horesh nadavh@visionsense.com wrote:
in test.py change to
print FFMCcalc.FFMCcalc(T,H,W,ro,Fo)
As implied from the line
print FFMCcalc.FFMCcalc.__doc__
Nadav
Original Message From: numpydiscussionbounces@scipy.org on behalf of Matt Fearon Sent: Fri 21May10 21:55 To: numpydiscussion@scipy.org Subject: [Numpydiscussion] calling C function from Python via f2py
Hello,
I am trying to use f2py to generate a wrapped C function that I can call from Python (passing arguments to and from). I have this almost working, but I receive trouble with "exp and pow" related to C and some "pos (2) error" with one of my passed variables. My f2py syntax is:
f2py c lm FFMCcalc.pyf FFMCcalc.c
Also, my 3 scripts are short and attached.
 FFMCcalc.c, C function
 FFMCcalc.pyf, wrapper file
 test.py, short python code that calls C function
Any advice would greatly appreciated to get this working. thanks, Matt
NumPyDiscussion mailing list NumPyDiscussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpydiscussion
_______________________________________________ NumPyDiscussion mailing list NumPyDiscussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpydiscussion
Thanks for your time and assistance, Nadav. I will look into the SWIG list and or cython.
On Mon, May 24, 2010 at 2:37 PM, Nadav Horesh nadavh@visionsense.com wrote:
Sorry, can not figure it out, if you don't gen an answer on this list maybe you should address it on swig list. Personally I use cython for this purpose.
Nadav
Original Message From: numpydiscussionbounces@scipy.org on behalf of Matt Fearon Sent: Mon 24May10 15:43 To: Discussion of Numerical Python Subject: Re: [Numpydiscussion] calling C function from Python via f2py
Nadav,
Thank you. I believe it is working now, as the pos(2) error is gone. However, though the error is gone, my return variable from the C function is not being updated as if the C code is not executing? Syntax to the call the C function from Python is the following:
FFMCcalc.FFMCcalc(T,H,W,ro,Fo)
Should this execute the C code?
thanks, Matt
On Sun, May 23, 2010 at 1:44 AM, Nadav Horesh nadavh@visionsense.com wrote:
in test.py change to
print FFMCcalc.FFMCcalc(T,H,W,ro,Fo)
As implied from the line
print FFMCcalc.FFMCcalc.__doc__
Nadav
Original Message From: numpydiscussionbounces@scipy.org on behalf of Matt Fearon Sent: Fri 21May10 21:55 To: numpydiscussion@scipy.org Subject: [Numpydiscussion] calling C function from Python via f2py
Hello,
I am trying to use f2py to generate a wrapped C function that I can call from Python (passing arguments to and from). I have this almost working, but I receive trouble with "exp and pow" related to C and some "pos (2) error" with one of my passed variables. My f2py syntax is:
f2py c lm FFMCcalc.pyf FFMCcalc.c
Also, my 3 scripts are short and attached.
 FFMCcalc.c, C function
 FFMCcalc.pyf, wrapper file
 test.py, short python code that calls C function
Any advice would greatly appreciated to get this working. thanks, Matt
NumPyDiscussion mailing list NumPyDiscussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpydiscussion
NumPyDiscussion mailing list NumPyDiscussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpydiscussion
NumPyDiscussion mailing list NumPyDiscussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpydiscussion
participants (2)

Matt Fearon

Nadav Horesh