Title: Reading binary with header

Hello,

I am trying to head in a binary file that has a header and different character types. The array module apparently expects the typecode to be the same throughout. Here's what the file looks like:

Byte number:    type:   value:  purpose:
1-4             char    “ver.”
5-8             char    “0001” version number
9-12            int     1, 2, 3, or 4 data type: 1=unsigned byte 2=unsigned short 3=32-bit integer 4=32-bit floating point

13-16           int             x dimension, xdim
7-20            int             y dimension, ydim 
20-24           int             z dimension, zdim
25-28           int             xdim*ydim*zdim

The rest of the file contains the data array of type in indicated in bytes 9-12.

I have tried:
import Numeric as N
import array
fileobj = open(myfile, mode='rb')
s = array.array('f')
s.read(fileobj, size)
data = "" typecode=N.Int)
fileobj.close()

But the header must confuse things because I do get what I expect.

Any advice?

Best Regards,
Dan

Daniel R Einstein, PhD
Biological Monitoring and Modeling
Pacific Northwest National Laboratory
P.O. Box 999; MSIN P7-59
Richland, WA 99352
Tel: 509/ 376-2924
Fax: 509/376-9064
[EMAIL PROTECTED]


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