#13110: Allow coercion complex -> CC
-------------------------------------+------------------------------
Reporter: eviatarbach | Owner: jason, jkantor
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: coercion | Resolution:
Keywords: complex, beginner | Merged in:
Authors: Travis Scrimshaw | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by jdemeyer):
* component: numerical => coercion
Old description:
> `ComplexNumber` does not know how to convert from the Python `complex`
> type:
>
> {{{
> sage: ComplexNumber(complex('13.8+6.2j'))
> TypeError: unable to coerce to a ComplexNumber: <type 'str'>
> }}}
New description:
This works fine:
{{{
sage: CC(complex('13.8+6.2j'))
13.8000000000000 + 6.20000000000000*I
sage: CDF(complex('13.8+6.2j'))
13.8 + 6.2*I
}}}
However, it is a ''conversion'' while it should be a ''coercion''.
{{{
sage: CC.has_coerce_map_from(complex)
False
}}}
This is inconsistent with
{{{
sage: CC.has_coerce_map_from(float)
True
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/13110#comment:24>
Sage <http://www.sagemath.org>
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