Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 1483 by hastebrot: no xor in sympy.core.basic for new logic module
http://code.google.com/p/sympy/issues/detail?id=1483
I wonder why there is no xor in the new logic module, resp. in
sympy.core.basic. Is this intentional?
into sympy/core/basic.py:
def __xor__(self, other):
"""Overloading for ^ operator"""
from sympy.logic.boolalg import Or, And, Not
return And(Or(self, other), Not(And(self, other)))
test it in the console:
>>> a, b = symbols("ab")
>>> a ^ b
And(Or(a, b), Or(Not(a), Not(b)))
looks strange after normalisation.
I see the problem, that creating a Xor class into sympy.logic.boolalg (for
better readability) is redundant, since it uses fundamental logical
operators (and, or, not) which are already defined. so is it better to put
only the fundamental ones into the modules?
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