Updates:
Summary: Unpickling a Singleton doesn't return the singleton object
Status: Accepted
Labels: -Priority-Medium Priority-High Milestone-Release0.7.1
Comment #1 on issue 2204 by [email protected]: Unpickling a Singleton
doesn't return the singleton object
http://code.google.com/p/sympy/issues/detail?id=2204
The problem is that the unpickled object should be the same as the original
one (not just equal to it), but it isn't:
In [6]: aa = pickle.loads(pickle.dumps(S.Pi))
In [7]: type(aa)
Out[7]: <class 'sympy.core.numbers.Pi'>
In [8]: aa is S.Pi
Out[8]: False
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