Comment #6 on issue 1374 by akshaysrinivasan: simplify(x**2-x**2.0) does
not yield 0.
http://code.google.com/p/sympy/issues/detail?id=1374
I tried this tweak:
diff --git a/sympy/core/numbers.py b/sympy/core/numbers.py
index f9cc5f2..ae8dc7e 100644
--- a/sympy/core/numbers.py
+++ b/sympy/core/numbers.py
@@ -240,6 +240,9 @@ class Real(Number):
__slots__ = ['_mpf_', '_prec']
# mpz can't be pickled
+ def __hash__(self):
+ return hash(float(self))
+
def __getnewargs__(self):
return (mlib.to_pickable(self._mpf_),)
@@ -761,6 +764,9 @@ class Integer(Rational):
__slots__ = ['p']
+ def __hash__(self):
+ return hash(int(self))
+
def _as_mpf_val(self, prec):
return mlib.from_int(self.p)
and now it automatically converts the Real into an Integer.
>>> x**2.0
x**2
How is this ?
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