Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 2443 by adampaet...@gmail.com: Result of subs() is incorrect
after unpickling
http://code.google.com/p/sympy/issues/detail?id=2443
After pickling and then unpickling the attached symbolic expression, the
value returned by subs() is incorrect.
The attached files illustrate the bug. The output is as follows:
python unpickle.py
0.00120006086051012
python unpickle.py pickle
0.000434779937054191
The correct value of 0.0012 is calculated by sympifying the (very long)
string in stringA.py and then calling subs(). The incorrect value of
0.0004 results from pickling and then unpickling the same sympified string.
Note that the actual expression (obtained by calling str(), for example)
seems to be correctly restored by unpickling. Its only the value computed
by subs() that is incorrect.
Attachments:
unpickleBug.py 598 bytes
stringA.py 54.2 KB
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