F2PY is a tool that provides an interface between the Python and Fortran programming languages.
F2PY is a tool that provides an interface between the python and fortran programming languages. F2PY is part of numpy.
Questions tagged [f2py]
491 questions
9
votes
2 answers
f2py -- prevent array reordering
I have an array which is read from a fortran subroutine as a 1D array via f2py. Then in python, that array gets reshaped:
a=np.zeros(nx*ny*nz)
read_fortran_array(a)
a=a.reshape(nz,ny,nx) #in fortran, the order is a(nx,ny,nz), C/Python it is…
mgilson
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8
votes
2 answers
f2py error with allocatable arrays
I have a Fortran subroutine that I would like to use in Python.
subroutine create_hist(a, n, dr, bins, hist)
integer, intent(in) :: n
real(8), intent(in) :: a(n)
real(8), intent(in) :: dr
integer, intent(out), allocatable :: hist(:)
…
petervanya
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8
votes
2 answers
Install f2py with python3
I need to call routines from Fortran modules within Python. I did it with f2py and python2.7. It worked pretty well.
Now, I have to use it with python3 but f2py does not seem to be compatible with python3.
I see that some people use a version called…
jvtrudel
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8
votes
0 answers
Complicated Cython embedded executable with f2py compiled module
I am trying to cythonize a python project found at https://pypi.python.org/packages/source/p/phaseshifts/phaseshifts-0.1.2-dev.zip with the end goal of creating a standalone executable for the phsh.py module. The core structure of the project I wish…
Liam Deacon
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8
votes
2 answers
Stop python code in (Fortran) module error using f2py?
I am creating a Python module in Fortran using f2py. I would like produce an error (including error message) in the Python program if an error is encountered in the Fortran module. Consider the following example:
Fortran code (test.f):
subroutine…
Tom de Geus
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8
votes
1 answer
Numpy distutils howto
I spent almost an hour googling for the solution, but the documentation for numpy.distutils is very sparse.
I have a f2py-wrapped module. It consists basically of 3 files:
a.f90
a.pyf
lib.a <- this is a static library that contains most of the…
Ivan Oseledets
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7
votes
1 answer
How do I compile a Fortran library for use with Python? (f2py may not be an option)
I'm trying to compile a fortran90 library (specifically this one) in order to call it from python (3.4.0). Generally in this case I would write a wrapper for f2py and call it a day, but the library itself makes use of derived types, which seems to…
Elliot
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7
votes
1 answer
Why is my Fortran code wrapped with f2py using so much memory?
I am trying to calculate all the distances between approximately a hundred thousand points. I have the following code written in Fortran and compiled using f2py:
C 1 2 3 4 5 6 …
Steven C. Howell
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7
votes
1 answer
Including a compiled module in module that is wrapped with f2py (Minimum working example)?
I have tried, but am failing, to get a minimum working example. As I do not need to expose much of my fortran code to python, I don't need f2py to wrap large parts of it. Also, due to allocatable arrays being passed and derived types being used, I…
GPMueller
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7
votes
3 answers
Fortran extension to Python via f2py: How to profile?
I'm using an extension to Python (2.7.2) written in Fortran (gfortran 4.4.7) compiled via f2py (Ver. 2).
I can profile the Python part with cProfile, but the result does not give any information about the Fortran functions. Instead the time is…
NichtJens
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6
votes
1 answer
Why can I call Fortran subroutine through f2py without having right number of inputs?
I am trying to learn f2py and I have the following Fortran code
subroutine fibonacci(a, n)
implicit none
integer :: i, n
double precision :: a(n)
do i = 1, n
if (i .eq. 1) then
a(i) = 0d0
…
zyy
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6
votes
1 answer
compilation error with f2py and gfortran: undefined reference to `main'
I recently started using f2py and python2.7 for working on some codes related to an ocean model (ROMS) in Fortran. My workstation specifics are Ubuntu 16.04 with python2.7, anaconda2 and gfortran. I have netcdf and hdf5 libraries installed as…
Sonaljit Mukherjee
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6
votes
1 answer
f2py with OMP: can't import module, undefined symbol GOMP_*
I was hoping to use openmp to speed up my Fortran code that I run through f2py. However, after compiling succesfully, I can't import the module in Python.
For a Fortran95 module like this:
module test
implicit none
contains
subroutine…
Mark
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6
votes
2 answers
What is f2py used for while building numpy source?
When I list all the Fortran files in NumPy's source tree, I…
osolmaz
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6
votes
2 answers
Porting an old fortran program to work with python+numpy
I am supposed to be doing research with this huge Fortran 77 program (which I recently ported to Fortran 90 superficially). It is a very old piece of software used for modeling using finite element methods.
It is a monstrosity. It is roughly…
osolmaz
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