Status: Accepted
Owner: asmeurer
Labels: Type-Defect Priority-Medium
New issue 2560 by asmeurer: Id should be a Singleton
http://code.google.com/p/sympy/issues/detail?id=2560
In [35]: a = Lambda(x, x)
In [36]: b = Lambda(y, y)
In [37]: a
Out[37]: Lambda(_x, _x)
In [38]: b
Out[38]: Lambda(_x, _x)
In [39]: a is b
Out[39]: True
In [40]: S.Id
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
/Users/aaronmeurer/Documents/python/sympy/sympy-scratch/<ipython console>
in <module>()
AttributeError: 'SingletonRegistry' object has no attribute 'Id'
Since Id seems to be singletonized, it should be in S.
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