On Dec 6, 7:20 pm, Grant Edwards <[EMAIL PROTECTED]> wrote:
> It's a little less obtuse if you spell it this way:
>
> def flipbits(x):
> """reverse bits in a byte"""
> x1 = x << 4 | x >> 4
> x2 = (x1 & 0x33) << 2 | (x1 & 0xcc) >> 2
> return (x2 & 0x55) << 1 | (x2 & 0xaa) >> 1
>
Granted. And a little more obtuse this way:
def flipbits(x):
"""reverse bits in a byte"""
x += 255*(x & 15)
x += 15*(x & 816)
x += 3*(x & 5440)
return x >> 7
I apologise---it's the end of a long day and I'm feeling more than a
little contrary.
Mark
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