need reading file in binary mode

Sergey P. Vazulia svazulia at
Thu Dec 1 14:20:28 CET 2005

this part of my code:

        f = file(work_dir + filename,'r')
        n = int(totalSize/recordLenth)
        i = 0
        while i < n:
            buf =;

sometime (when find something like \0A\00\00 in data) returm less bytes then
file have.

Q: how-to read all data from binary file with constant_length portions?

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