Status: Valid
Owner: ----
Labels: Type-Defect Priority-Medium WrongResult
New issue 3775 by [email protected]: Lambda._hashable_content is incorrect
http://code.google.com/p/sympy/issues/detail?id=3775
In [64]: Lambda(x, x*y) == Lambda(z, z*y**2)
Out[64]: False
In [65]: hash(Lambda(x, x*y)) == hash(Lambda(z, z*y**2))
Out[65]: True
That's because the _hashable_content of Lambda is
def _hashable_content(self):
return (self.nargs, ) + tuple(sorted(self.free_symbols))
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