Comment #19 on issue 281 by [email protected]: Infinity is a subclass of
Rational
http://code.google.com/p/sympy/issues/detail?id=281
The problem is this little gem in test_repr.py:
def test_printmethod():
class R(oo.__class__):
def _sympyrepr(self, printer):
return "foo"
assert srepr(R()) == "foo"
class R(Abs):
def _sympyrepr(self, printer):
return "foo(%s)" % printer._print(self.args[0])
assert srepr(R(x)) == "foo(Symbol('x'))"
This registers R with SingletonRegistry. I guess the solution here is to
just replace oo.__class__ with Rational, which is what it used to be,
though I don't understand why that test was created with that particular
subclass in the first place (git blaming it doesn't lead to any insight).
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