#8276: Make the one(), identity_matrix() and zero_matrix() cached and immutable.
------------------------------+---------------------------------------------
Reporter: hivert | Owner: hivert
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.3.3
Component: linear algebra | Keywords: One mutable.
Author: Florent Hivert | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by hivert):
Oups ! I just realize I forgot to reupload {{{trac_8276
-fix_zero_matrix_creation-fh.patch}}} after a last minor change. Many
apologies if you started to review ! For info here is the changelog
between the two last version of the patch
{{{
2.31 @@ -85,6 +85,8 @@
2.32 []
2.33 + sage: mat.is_mutable()
2.34 + False
2.35 ++ sage: MM.zero().is_mutable()
2.36 ++ False
2.37 """
2.38 - try:
2.39 - z = self.__zero_matrix
2.40 @@ -98,6 +100,8 @@
2.41 + res.set_immutable()
2.42 + return res
2.43 +
2.44 ++ zero = zero_matrix
2.45 ++
2.46 def ngens(self):
2.47 """
2.48 Return the number of generators of this matrix space,
}}}
Again, sorry for any inconvenience.
Florent
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8276#comment:10>
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