Help/example of bit testing

[François Granger]

Bryan Webb <bww00 at amdahl.com> wrote:

> Hi,
>     I am reading a file (binary)of 1024 char recs (bitmaps) . I can read the
> file , bit im having trouble finding examples of testing bits. I need to
> look at each bit of the above record.
> Looking for examples and ideas.

I got inspired by an algorithm by Tim Peters, so I did a quick hack in
order to display in binary form. It need some polishing.

l = [1, 2, 3, 4, 8, 16, 32, 64, 128, 255, 512, 1024, 2048, 4096, 8192,
16384, 32768]

def toBin(x):
    a = ''
    y = x
    while x:
        x, y = x / 2, y % 2
        if y:
            a = '1' + a
        else:
            a = '0' + a
        y = x
    return
for x in l:
    print toBin(x)


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