The documentation for f2py is not very complete, I'm afraid. I'll try to work on that front in the next few months. For now, you can find it here: https://numpy.org/doc/stable/f2py
Cheers, Melissa On Mon, Oct 19, 2020 at 2:35 PM Samuel Dupree <sdup...@speakeasy.net> wrote: > One more question. Where can I find a documentation on f2py that covers > issues like assumed shaped arrays, and issues such as the one discussed in > this post? > > Sam Dupree. > > > On October/19/2020 13:01:13, Melissa Mendonça wrote: > > Sure, you can use assume-shape arrays, but if you generate a signature > file using > > $ f2py rkfn78.for -m rkfn78 -h rkfn78.pyf > > you can see that f2py correctly determines n to be the length of the array > Y, but since YP also depends on n, that's what generated the error you saw > the first time. > > If you change the .pyf signature file to the one attached to this message, > delete your original cf2py lines in the .for file and compile it all using > > $ f2py -c rkfn78.pyf rkfn78.for --fcompiler=gfortran --f77flags="-c -O > -Wall" -m rkfn78 > > then you'll have no trouble with assumed-shape arrays. > > Cheers, > > Melissa > > On Mon, Oct 19, 2020 at 1:03 PM Samuel Dupree <sdup...@speakeasy.net> > wrote: > > > > Melissa, > > > > Thank you for answering my post. I made the changes you recommended and > the code compiles successfully. But I do have one question. The arrays > being passed in the CALL to FCN were treated as assumed shaped arrays in > the called subroutine. Are assumed shaped arrays a problem for f2py? > > > > Sam Dupree. > > > > > > On October/19/2020 09:16:02, Melissa Mendonça wrote: > > > > Hello, Sam, sorry for taking so long to answer! > > > > The problem seems to be that you are using > > > > cf2py depend(in) Y, YP > > > > instead of > > > > cf2py depend(n) Y, YP <- (note that there was a spurious i in that > depend expression) > > > > and that the callback FCN needs the dimension n as an argument. I was > able to compile your code correctly after making these changes. > > > > If you have any further questions let me know, I hope this helps. > > > > Cheers, > > > > Melissa > > > > > > On Wed, Oct 14, 2020 at 4:03 AM Samuel Dupree <sdup...@speakeasy.net> > wrote: > >> > >> I'm attempting to wrap a Fortran-77 source member using f2py. I'm > >> running he Anaconda distribution for Python 3.7.6 on a Mac Pro (2019) > >> under Mac OS X Catalina (ver. 10.15.6). The version of NumPy I'm running > >> is 1.18.3. > >> > >> I've attached a copy of the Fortran source code to this note (see > >> rkfn78.for). The command I'm using to wrap this code is > >> > >> f2py3 -c rkfn78.for --fcompiler=gfortran --f77flags="-c -O -Wall" -m > rkfn78 > >> > >> The output I get is captured in the file rkfn78_build_output.txt. > >> > >> I don't understand the cause behind the error message I get, so any > >> advice would be welcomed. > >> > >> Sam Dupree. > >> _______________________________________________ > >> NumPy-Discussion mailing list > >> NumPy-Discussion@python.org > >> https://mail.python.org/mailman/listinfo/numpy-discussion > > > > > > _______________________________________________ > > NumPy-Discussion mailing list > > NumPy-Discussion@python.org > > https://mail.python.org/mailman/listinfo/numpy-discussion > > > > >
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