2's complement conversion. Is this right?

[Ross Ridge]

Ross Ridge <rridge at caffeine.csclub.uwaterloo.ca> said:
> If you have Python 2.5, here's a faster version:
> 
> 	from struct import *
> 	unpack_i32be = Struct(">l").unpack
> 
> 	def from3Bytes_ross2(s):
> 	    return unpack_i32be(s + "\0")[0] >> 8
 

Bob Greschke  <bob at passcal.nmt.edu> wrote:
> That's not even intelligible.  I wanna go back to COBOL. :)

It's the same as the previous version except that it "precompiles"
the struct.unpack() format string.  It works similar to the way Python
handles regular expressions.
 
				Ross Ridge

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