Hello NG,
that may sound a silly question, but I didn't find anything really
clear about the issue of reading unformatted big endian files with
Python. What I was doing till now, was using Fortran to read those
files and compile this Fortran extension using F2PY. Now that it seems
that no possible combinations of Fortran/C compilers actually *work*
with Python 2.4 on Windows XP, I was trying to translate the Fortran
subroutine to Python. Basically, what I do (in Fortran, I hope to
explain the code clearly) is:
! Declare an integer
integer number
! Declare a 4-chars character
character*4 keytype
! Declare a 8-chars character
character*8 keyword
! feof is not very important here
logical feof
feof = .false.
! Open the file as unformatted big-endian
open(unit = , file = filename, form = 'UNFORMATTED', convert = 'BIG_ENDIAN')
! loop until you find a particular keyword
! here "end=10" means that if the routine finds the EOF, it should go to
! the label "10 continue". "err=8" means that, if an error occours in
reading the file,
! it should go to the label "8 continue" and continue reading the file
do while(.not.feof)
! Read the 3 variables keyword, number and keytype
read(1, end=10, err=8) keyword, number, keytype
! If the keyword is 'DIMENS', break the loop and go to the end
if (keyword == 'DIMENS') then
read(1, end=10, err=8) dimens
goto 10
endif
8 continue
enddo
10 continue
! Close the file
close(1)
Well, does anyone have some suggestion about which kind of
material/tutorial on similar things I should read? How can I deal in
Python with variables that must be 8-chars or 4-chars in order to read
correctly the file? Am I missing something else?
Thank you very much for every suggestion.
Andrea.
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"Imagination Is The Only Weapon In The War Against Reality."
http://xoomer.virgilio.it/infinity77/
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