#13801: Fix facade set category initialisation
--------------------------+-------------------------------------------------
Reporter: vdelecroix | Owner: vdelecroix
Type: defect | Status: new
Priority: major | Milestone: sage-5.6
Component: categories | Keywords: category, facade
Work issues: | Report Upstream: N/A
Reviewers: | Authors: Vincent Delecroix
Merged in: | Dependencies:
Stopgaps: |
--------------------------+-------------------------------------------------
Facade sets are used in many places but there are two small errors that
prevent from using it everywhere...
Here is the first error
{{{
class A(Parent):
def __init__(self):
Parent.__init__(self, facade=True,
category=((FiniteEnumeratedSets(),Monoids()))
}}}
for which we get
{{{
sage: A()
Traceback (most recent call last):
...
AttributeError: 'tuple' object has no attribute 'is_subcategory'
}}}
And the second conerns the behavior of .facade_for() which is better
explained with a minimal example
{{{
class B(Parent):
def __init__(self):
Parent.__init__(self, category=Sets(), facade=True)
}}}
for which we get
{{{
sage: b = B()
sage: b.facade_for()
Traceback (most recent call last):
...
AttributeError: 'B_with_category' object has no attribute '_facade_for'
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13801>
Sage <http://www.sagemath.org>
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