XOR on string

Peter Hansen peter at engcorp.com
Wed Jan 26 15:57:17 EST 2005

snacktime wrote:
> I need to calculate the lrc of a string using an exclusive or on each
> byte in the string.  How would I do this in python?

lrc == Linear Redundancy Check?  or Longitudinal?  Note that
such terms are not precisely defined... generally just acronyms
people make up and stick in their user manuals for stuff. :-)

import operator
lrc = reduce(operator.xor, [ord(c) for c in string])

Note that this returns an integer, so if you plan
to send this as a byte or compare it to a character
received, use chr(lrc) on it first.


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