#13814: LazyFamily.__eq__ gives false positives.
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Reporter: cnassau | Owner: sage-combinat
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.6
Component: combinatorics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Christian Nassau | Merged in:
Dependencies: | Stopgaps:
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Comment (by cnassau):
> In order to separate the two issues, what about changing the failing
> examples to use Partitions (which pickles smoothly), rather than
> making it more complicated with some workaround that won't be needed
> hopefully sometime soon, and is not vital for most users?
Actually, {{{Partitions}}} doesn't really pickle very well either:
{{{#!python
sage: # first attempt
sage: f=Family(NonNegativeIntegers(),Partitions) ; f
Lazy family (Partitions(i))_{i in Non negative integers}
sage: loads(dumps(f))
Traceback (most recent call last)
...
ValueError: Cannot pickle code objects from closures
sage: # second attempt
sage: f=Family(NonNegativeIntegers(),lambda n:Partitions(n))
sage: g=loads(dumps(f))
sage: f[5]
Partitions of the integer 5
sage: g[5]
Traceback (most recent call last)
...
NameError: global name 'Partitions' is not defined
}}}
I can use {{{Simplex}}} for a smooth example:
{{{#!python
sage: f=Family(NonNegativeIntegers(),Simplex)
sage: g=loads(dumps(f))
sage: f[5]
(0, 1, 2, 3, 4, 5)
sage: g[5]
(0, 1, 2, 3, 4, 5)
}}}
I'll try to prepare a new patch tomorrow.
Cheers, \\
Christian
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13814#comment:20>
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