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Split dev-facing extras into PEP 735 dependency groups (and the pip ≥ 25.1 implication)

Status: Open.

#763 In PyPSA/linopy;

· FBumann opened on Jun 5, 2026

Multi-key groupby([names]).sum() densifies to a dense cartesian grid (memory)

performanceThis improves performance while not (meaningfully) altering behaviour for usersThis improves performance while not (meaningfully) altering behaviour for users

Status: Open.

#757 In PyPSA/linopy;

· FBumann opened on Jun 4, 2026

·  

Resolve Memory issues in sparse models

Umbrella: long-format / sparse _term kernel (dense-_term memory cluster)

data-model

performanceThis improves performance while not (meaningfully) altering behaviour for usersThis improves performance while not (meaningfully) altering behaviour for users

Status: Open.

#756 In PyPSA/linopy;

· FBumann opened on Jun 4, 2026

·  

Resolve Memory issues in sparse models

groupby() by the name of a non-dimension coordinate raises (xarray parity)

enhancementNew feature or requestNew feature or request

Status: Open.

#750 In PyPSA/linopy;

· FBumann opened on Jun 4, 2026

merge of ragged expressions is the peak allocation in PyPSA model builds

performanceThis improves performance while not (meaningfully) altering behaviour for usersThis improves performance while not (meaningfully) altering behaviour for users

Status: Open.

#749 In PyPSA/linopy;

· FBumann opened on Jun 4, 2026

·  

Resolve Memory issues in sparse models

@/dot against a sparse matrix densifies the result to full _term

performanceThis improves performance while not (meaningfully) altering behaviour for usersThis improves performance while not (meaningfully) altering behaviour for users

Status: Open.

#748 In PyPSA/linopy;

· FBumann opened on Jun 4, 2026

·  

Resolve Memory issues in sparse models

groupby-sum pads every group to the largest group size

performanceThis improves performance while not (meaningfully) altering behaviour for usersThis improves performance while not (meaningfully) altering behaviour for users

Status: Open.

#745 In PyPSA/linopy;

· FBumann opened on Jun 3, 2026

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Resolve Memory issues in sparse models

Decision before v1: first-class MultiIndex support vs. flat dims + auxiliary level coords

questionFurther information is requestedFurther information is requested

Status: Open.

#744 In PyPSA/linopy;

· FBumann opened on Jun 3, 2026

Benchmark comparison vs polar-high (Polars-backed LP/MIP eDSL on HiGHS) — thoughts?

performanceThis improves performance while not (meaningfully) altering behaviour for usersThis improves performance while not (meaningfully) altering behaviour for users

Status: Open.

#740 In PyPSA/linopy;

· MaykThewessen opened on Jun 2, 2026

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Resolve Memory issues in sparse models

Unify deprecation warning channels before v1: EvolvingAPIWarning vs LinopySemanticsWarning

Status: Open.

#738 In PyPSA/linopy;

· FBumann opened on Jun 2, 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

·  

Predictabe Semantics: Arithmetics, Broadcasting, Joining, Absence

Tighten type hints on add_variables / add_constraints / add_objective

Status: Open.

#734 In PyPSA/linopy;

· FBumann opened on May 27, 2026