Supercomputer and encryption and compression @ rate of 96%

[km]

Hi all,

This was posted long ago.
I tried to compress a  mp3 file but i couldnt get the keycode+".out" file which is of size 1 bit. instead it is printed to STDOUT. i am usng python 2.4 . i understand that the keycode is embedded in the filename itself. Is it a problem with python not able to create a file with such a big filename ? 
any workarounds ? 

regards,
KM
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On Thu, Apr 14, 2005 at 01:49:22PM +0200, Fredrik Lundh wrote:
> Will McGugan wrote:
> 
> > Please implement this as a Python module. I would like to compress my mp3 collection to single 
> > bits.
> 
> here's the magic algorithm (somewhat simplified):
> 
> def algorithm(data):
>     m = 102021 # magic constant
>     d = [int(c) for c in str(1*2*3*4*5*m+5+4+2+1)]
>     x = [ord(c) for c in hex(1+2+4+5+m*5*4*3*2*1)]
>     x[d[0]*d[1]*d[2]] = x[d[-1]] + sum(d) - d[d[-d[-1]-1]] + d[0]
>     x = __import__("".join(chr(c) for c in x[d[0]*d[1]:])).encodestring
>     return "".join(x(data).split("\n")).rstrip("="), sum(d)-sum(reversed(d))
> 
> and here's a driver for your MP3 collection:
> 
> import glob
> 
> def compress(filename):
>     data = open(filename, "rb").read()
>     keycode, bit = algorithm(data)
>     file = open(keycode + ".out", "wb")
>     file.write(chr(bit))
>     file.close()
>     print "compressed", filename,
>     print len(data), "=>", 1, round(100.0/len(data), 3), "%"
> 
> for file in glob.glob("*.mp3"):
>     compress(file)
> 
> </F> 
> 
> 
> 
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