Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 2438 by [email protected]: repr() does not eval() to the same
value
http://code.google.com/p/sympy/issues/detail?id=2438
a = Symbol('a')
b = a/(2*a)
print (b, eval(repr(b))) # (1/2, 0)
from __future__ import division
print (b, eval(repr(b))) # (1/2, 0.5)
I guess there is no nice solution because the compact representation 1./2
implies a change from integer to floating point. However, it is still
unexpected for repr() to produce something that is actually different. (I
found this when extracting part of a printed expression in ipython.) From
the docs for repr()
For many types, this function makes an attempt to return a string that
would yield an object with the same value when passed to eval(), otherwise
the representation is a string enclosed in angle brackets that contains the
name of the type of the object together with additional information often
including the name and address of the object.
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