Updates:
Status: Started
Comment #5 on issue 1946 by mattpap: Recursion error with
SYMPY_GROUND_TYPES=sympy (caching problem)
http://code.google.com/p/sympy/issues/detail?id=1946
Also, for the second conditional, it doesn't consider S.One,
S.NegativeOne, or
S.Zero, which are sympified integers but not Integer's.
This is actually not true:
In [1]: isinstance(S.One, Integer)
Out[1]: True
In [2]: isinstance(S.NegativeOne, Integer)
Out[2]: True
In [3]: isinstance(S.Zero, Integer)
Out[3]: True
- if type(b) is int:
There are more statements like this one in the core:
sympy/core/decorators.py:72: if type(b) is int:
sympy/core/numbers.py:854: if type(b) is int:
sympy/core/numbers.py:861: if type(b) is int:
sympy/core/numbers.py:868: if type(b) is int:
sympy/core/numbers.py:875: if type(b) is int:
sympy/core/numbers.py:882: if type(b) is int:
sympy/core/numbers.py:889: if type(b) is int:
sympy/core/numbers.py:901: if type(b) is int:
sympy/core/numbers.py:908: if type(b) is int:
sympy/core/numbers.py:915: if type(b) is int:
sympy/core/numbers.py:922: if type(b) is int:
sympy/core/numbers.py:929: if type(b) is int:
sympy/core/numbers.py:936: if type(b) is int:
sympy/core/numbers.py:1046: if type(b) is int:
sympy/core/numbers.py:1058: if type(b) is int:
sympy/core/numbers.py:1077: if type(b) is int:
sympy/core/numbers.py:1091: if type(b) is int:
sympy/core/numbers.py:1103: if type(b) is int:
The conclusion is that we need better tests for the core, e.g. with large
inputs or
with different types (it happens that polys touch those problems), and fix
all bugs
that we encounter.
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