#8869: float(CDF(1)) should return 1.0, not throw an error
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Reporter: jason | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.4.3
Component: basic arithmetic | Keywords:
Author: Jason Grout | Upstream: N/A
Reviewer: Karl-Dieter Crisman, Leif Leonhardy | Merged:
Work_issues: |
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Comment(by kcrisman):
I don't think we are trying to be contentious here. Yes, there are
inconsistencies, but that is just to be expected (I would even say it
follows from Arrow's Theorem). The point is to make it as natural to
mathematicians as possible, and float(CDF(1)) certainly smells like 1.0 to
me. int is a little different, but it seems to me that since Python isn't
consistent anyways
{{{
>>> int(1.1)
1
>>> float(1+0j)
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: can't convert complex to float; use abs(z)
}}}
we might as well make the best of it and let int be the "round closest to
zero" function, in essence. And it's documented, and it's not the natural
thing one would do (Integer(1.1) behaves as you would like).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8869#comment:6>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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