Hi,
I traced this bug, and found that
sage: B=QQ[x]
sage: print B({0:1,1:2})
sage: print B({(0,):1,(1,):2})
2*x + 1
2*x + 1
sage: B=GF(5)[x]
sage: print B({0:1,1:2})
sage: print B({(0,):1,(1,):2})
2*x + 1
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/kwankyu/.sage/sage_notebook/worksheets/admin/0/code/
29.py", line 9, in <module>
exec compile(ur'print B({(_sage_const_0 ,):_sage_const_1 ,
(_sage_const_1 ,):_sage_const_2 })' + '\n', '', 'single')
File "/usr/local/sage/local/lib/python2.5/site-packages/
SQLAlchemy-0.4.6-py2.5.egg/", line 1, in <module>
File "parent.pyx", line 288, in
sage.structure.parent.Parent.__call__ (sage/structure/parent.c:4320)
File "coerce_maps.pyx", line 81, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_ (sage/
structure/coerce_maps.c:3164)
File "coerce_maps.pyx", line 76, in
sage.structure.coerce_maps._call_ (sage/structure/coerce_maps.c:3039)
File "/usr/local/sage/local/lib/python2.5/site-packages/sage/rings/
polynomial/polynomial_ring.py", line 312, in _element_constructor_
return C(self, x, check, is_gen, construct=construct, **kwds)
File "polynomial_zmod_flint.pyx", line 72, in
sage.rings.polynomial.polynomial_zmod_flint.Polynomial_zmod_flint.__init__
(sage/rings/polynomial/polynomial_zmod_flint.c:11609)
File "polynomial_template.pxi", line 119, in
sage.rings.polynomial.polynomial_zmod_flint.Polynomial_template.__init__
(sage/rings/polynomial/polynomial_zmod_flint.c:5246)
TypeError: 'tuple' object cannot be interpreted as an index
I think the second form is not acceptable. Then the function
remove_from_tuple() in sage.rings.polynomial.multi_polynomial.pyx
should be revised as it output (1,) from (1,2) for example.
Kwankyu
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