Btw, 

>>> from operator import xor
>>> help(xor)
Help on built-in function xor in module operator:

xor(...)
    xor(a, b) -- Same as a ^ b.

>>>

And just nosing around for code that uses the word xor you guys are talking about reserving:

as a function (these are not examples that just do ^):
http://www.google.com/codesearch/p?hl=en&sa=N&cd=4&ct=rc#y7s_SD3fSG4/Python-1.2/Demo/sgi/gl/glstdwin/glstdwin.py&q=xor%20file:%5C.py$&l=376

http://www.google.com/codesearch/p?hl=en&sa=N&cd=10&ct=rc#xFWT5g5T9_Y/Singular-3-0-2/Singular/cnf2ideal.py&q=xor%20file:%5C.py$&l=68

as a variable name:
http://www.google.com/codesearch/p?hl=en&sa=N&cd=5&ct=rc#OmjbpIVasQU/Zope-3.2.0b1/Dependencies/twisted-Zope-3.2.0b1/twisted/words/protocols/toc.py&q=xor%20file:%5C.py$&l=71

http://www.google.com/codesearch/p?hl=en&sa=N&cd=20&ct=rc#ptHG4K-HqzI/lib/python2.4/site-packages/mixminion/test.py&q=xor%20file:%5C.py$&l=861


--yuv