#9769: symbolic function do not work with numpy.int64 arguments
-----------------------------+------------------------
Reporter: maldun | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-6.2
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
-----------------------------+------------------------
Old description:
> There seems to be some problems with the coercion of some datatypes to
> the symbolic ring:
>
> {{{
> sage: cos(MatrixSpace(ZZ, 2)([1, 2, -4, 7]))
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call
> last)
> .......
> TypeError: cannot coerce arguments: no canonical coercion from Full
> MatrixSpace of 2 by 2 dense matrices over Integer Ring to Symbolic Ring
>
> sage: import numpy
> sage: vec = numpy.array([1,2])
> sage: sin(vec)
> array([ 0.84147098, 0.90929743])
> sage: sin(vec[0])
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call
> last)
> ....
> TypeError: cannot coerce arguments: no canonical coercion from <type
> 'numpy.int64'> to Symbolic Ring
> ----
>
> sage: x = PolynomialRing(QQ, 'x').gen()
> sage: sin(x)
> sin(x)
> sage: x = PolynomialRing(RR, 'x').gen()
> sage: sin(x)
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call
> last)
> .....
> TypeError: cannot coerce arguments: __call__() takes exactly 1 positional
> argument (0 given)
> sage: x = PolynomialRing(CC, 'x').gen()
> sage: sin(x)
> sin(x)
> }}}
New description:
There seems to be some problems with the coercion of some datatypes to the
symbolic ring:
{{{
sage: cos(MatrixSpace(ZZ, 2)([1, 2, -4, 7]))
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
.......
TypeError: cannot coerce arguments: no canonical coercion from Full
MatrixSpace of 2 by 2 dense matrices over Integer Ring to Symbolic Ring
sage: import numpy
sage: vec = numpy.array([1,2])
sage: sin(vec)
array([ 0.84147098, 0.90929743])
sage: sin(vec[0])
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
....
TypeError: cannot coerce arguments: no canonical coercion from <type
'numpy.int64'> to Symbolic Ring
--
Comment (by rws):
Replying to [comment:2 burcin]:
> {{{
> sage: x = PolynomialRing(RR, 'x').gen()
> sage: sin(x)
> <boom>
> }}}
>
> The problem here is really coercion, but it should be copied to another
ticket (in the basic_arithmetic component):
Incidentally this is part of #16197.
> The `__call__()` function of RR[x] doesn't conform to the generic
definition. You should be able to give the parameters as a keyword
argument as well. This should be made to work:
>
> {{{
> sage: R.<x> = RR[]
> sage: (x^2+1)(x=5)
> 11
> }}}
Will copy this info there.
--
Ticket URL: <http://trac.sagemath.org/ticket/9769#comment:5>
Sage <http://www.sagemath.org>
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