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Inconsistent creation of dimensions in add_variables

bugSomething isn't workingSomething isn't working

Status: Open.

#450 In PyPSA/linopy;

· jkiviluo opened on Apr 26, 2025

Inconsistent multiplication behavior: Variable vs LinearExpression with subset coordinates

bugSomething isn't workingSomething isn't working

Status: Open.

#569 In PyPSA/linopy;

· FabianHofmann opened on Feb 6, 2026

Inconsistent behavior when multiplying with subset coordinates

Status: Open.

#570 In PyPSA/linopy;

· FabianHofmann opened on Feb 6, 2026

Constraints do not match RHS based on coordinates

bugSomething isn't workingSomething isn't working

Status: Open.

#586 In PyPSA/linopy;

· thomgeo opened on Feb 13, 2026

Improve documentation on overriding coordinates feature

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#256 In PyPSA/linopy;

· apfelix opened on Mar 12, 2024

Inconsistent coordinate override in arithmetic expressions

data-model

Status: Open.

#257 In PyPSA/linopy;

· apfelix opened on Mar 14, 2024

Auxiliary non-dimension coordinates leak into expressions and break alignment

data-model

enhancementNew feature or requestNew feature or request

Status: Open.

#295 In PyPSA/linopy;

· aurelije opened on May 24, 2024

bug when adding two linopy expressions/variables that share dimension names but have disjoint label coordinates of same size

bugSomething isn't workingSomething isn't working

Status: Open.

#670 In PyPSA/linopy;

· sdementen opened on May 2, 2026

Extend xarray method coverage on Variable / LinearExpression

discussion

enhancementNew feature or requestNew feature or request

Status: Open.

#703 In PyPSA/linopy;

· FBumann opened on May 20, 2026

x - a <= 0 and x <= a build different constraints

bugSomething isn't workingSomething isn't working

Status: Open.

#707 In PyPSA/linopy;

· FBumann opened on May 21, 2026

Operators align coordinates inconsistently (* by label, + - / by position)

bugSomething isn't workingSomething isn't working

Status: Open.

#708 In PyPSA/linopy;

· FBumann opened on May 21, 2026

Subset constants break associativity: a + factor + b ≠ a + b + factor

Status: Open.

#711 In PyPSA/linopy;

· FBumann opened on May 21, 2026

An absent variable is indistinguishable from a zero variable

data-model

Status: Open.

#712 In PyPSA/linopy;

· FBumann opened on May 21, 2026

NaN in user-supplied data is silently filled instead of surfaced

Status: Open.

#713 In PyPSA/linopy;

· FBumann opened on May 21, 2026

Meta: predictable arithmetic — coordinate alignment and NaN handling

Status: Open.

#714 In PyPSA/linopy;

· FBumann opened on May 21, 2026

feat: v1 semantic convention

Status: Draft (not ready).

PyPSA/linopynumber 717

#717 In PyPSA/linopy;

· FBumann opened on May 21, 2026

v1 convention: pair unlabeled operands with dimensions by size, raise on ambiguity

data-model

enhancementNew feature or requestNew feature or request

Status: Open.

#736 In PyPSA/linopy;

· FBumann opened on Jun 1, 2026