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feat: add m.dualize() and m.bounds_to_constraints() for LP dualization #626

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feat: add m.dualize() and m.bounds_to_constraints() for LP dualization #626

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c22c94b
Added m.copy() method.
bobbyxng Mar 17, 2026
8218503
Added testing suite for m.copy().
bobbyxng Mar 17, 2026
2da2d35
Fix solver_dir type annotation.
bobbyxng Mar 17, 2026
bb6b8a4
Bug fix: xarray copyies need to be .
bobbyxng Mar 18, 2026
724b850
Intial commit: Working dualizer for LPs.
bobbyxng Mar 18, 2026
c49a2b8
Fixed typing issues. Initialise dual objective with LinearExpression(…
bobbyxng Mar 18, 2026
b6c26fe
Fixed more typing issues.
bobbyxng Mar 18, 2026
8b66ba0
Added code-block to dualize() examples.
bobbyxng Mar 18, 2026
883d858
Fix more typing issues.
bobbyxng Mar 18, 2026
1b6d09f
Fixed variable bounds for dualisation of max problems (primal) --> re…
bobbyxng Mar 18, 2026
f45c49c
Updated docstrings for max -> min.
bobbyxng Mar 18, 2026
fe8d952
Moved copy to io.py, added deep-copy to all xarray operations.
bobbyxng Mar 18, 2026
3dc0ef0
Merge branch 'copy' into dual
bobbyxng Mar 18, 2026
f4016a8
Improved copy method: Strengtheninc copy protocol compatibility, chec…
bobbyxng Mar 20, 2026
49e9246
Added release notes.
bobbyxng Mar 20, 2026
cad7110
Merge branch 'copy' into dual
bobbyxng Mar 20, 2026
4089a85
Made Model.copy defaulting to deep copy more explicit.
bobbyxng Mar 20, 2026
f38e4d9
Merge branch 'copy' into dual
bobbyxng Mar 20, 2026
0199d67
Fine-tuned docs and added to read the docs api.rst.
bobbyxng Mar 20, 2026
e1760d1
Merge branch 'copy' into dual
bobbyxng Mar 20, 2026
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1 change: 1 addition & 0 deletions doc/api.rst
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Expand Up @@ -24,6 +24,7 @@ Creating a model
piecewise.segments
model.Model.linexpr
model.Model.remove_constraints
model.Model.copy


Classes under the hook
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1 change: 1 addition & 0 deletions doc/release_notes.rst
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Expand Up @@ -4,6 +4,7 @@ Release Notes
Upcoming Version
----------------

* Add ``Model.copy()`` (default deep copy) with ``deep`` and ``include_solution`` options; support Python ``copy.copy`` and ``copy.deepcopy`` protocols via ``__copy__`` and ``__deepcopy__``.
* Harmonize coordinate alignment for operations with subset/superset objects:
- Multiplication and division fill missing coords with 0 (variable doesn't participate)
- Addition and subtraction of constants fill missing coords with 0 (identity element) and pin result to LHS coords
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