#9556: Dynamic attributes for symbolic expressions
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Reporter: SimonKing | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.0
Component: symbolics | Keywords: symbolic expression dynamic
attribute
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: segfaulting doctests |
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Comment(by mhansen):
I did a little mockup using this idea.
{{{
sage: from sage.symbolic.function import BuiltinFunction
sage: class ExampleBuiltin(BuiltinFunction):
....: def __init__(self):
....: BuiltinFunction.__init__(self, 'ex_func', nargs=0)
#arbitrary no of args
....: class EvaluationMethods:
....: def some_function_name(self):
....: return len(self.operands())
....:
sage: ex_func = ExampleBuiltin()
sage: f = ex_func(x, x+1, x+2)
sage: f.some_function_name()
3
sage: abs(f)
abs(ex_func(x, x + 1, x + 2))
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9556#comment:4>
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