Thanks Paul. I suppose this is now going slightly out of bounds for f2py. What I am looking for is the fortran kind type for a byte. I thought that this was int8. I guess the question is how to identify the kind type. Although I have verified that integer(1) seems to work for me, I would really like to know why and your answer alludes to that.
Please excuse my ignorance on this topic. Can you perhaps educate me a little on 'literal kind values'? I take you to mean that 'int8' is not a literal kind value while 1 and 8 are examples of literal kind values. Thanks, John On Tue, Apr 17, 2012 at 10:12 AM, Paul Anton Letnes < paul.anton.let...@gmail.com> wrote: > Ah, come to think of it, I think that f2py only supports literal kind > values. Maybe that's your problem. > > Paul > > On 17. apr. 2012, at 07:58, Sameer Grover wrote: > > > On Tuesday 17 April 2012 11:02 AM, John Mitchell wrote: > >> Hi, > >> > >> I am using f2py to pass a numpy array of type numpy.int8 to fortran. > It seems like I am misunderstanding something because I just can't make it > work. > >> > >> Here is what I am doing. > >> > >> PYTHON > >> b=numpy.array(numpy.zeros(shape=(10,),dtype=numpy.int8),order='F') > >> b[0]=1 > >> b[2]=1 > >> b[3]=1 > >> b > >> array([1, 0, 1, 1, 0, 0, 0, 0, 0, 0], dtype=int8) > >> > >> > >> > >> FORTRAN > >> subroutine print_bit_array(bits,n) > >> use iso_fortran_env > >> integer,intent(in)::n > >> integer(kind=int8),intent(in),dimension(n)::bits > >> print*,'bits = ',bits > >> end subroutine print_bit_array > >> > >> > >> RESULT when calling fortran from python > >> bits = 1 0 0 0 0 0 0 0 1 0 > >> > >> Any Ideas? > >> thanks, > >> John > >> > >> > >> > >> > >> _______________________________________________ > >> NumPy-Discussion mailing list > >> > >> NumPy-Discussion@scipy.org > >> http://mail.scipy.org/mailman/listinfo/numpy-discussion > > It seems to work if "integer(kind=int8)" is replaced with "integer(8)" > or "integer(1)". Don't know why, though. > > > > Sameer > > _______________________________________________ > > NumPy-Discussion mailing list > > NumPy-Discussion@scipy.org > > http://mail.scipy.org/mailman/listinfo/numpy-discussion > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion >
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