Python semantic layer: semantic_layer() and measure collection - #249

Draft

jat255 wants to merge 10 commits into

jat255/wwmt-schema-fixturefrom

jat255/wwmt-layer-collection

Commits on Sep 2, 2026

feat(py): semantic_layer over inline measures
jat255
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5b5c37a
fix: add suggestion line to duplicate measure names error
jat255
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75b4857
fix(py): nested list collection matches top-level first-definition-wins
jat255
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aae9343
style(py): restore blank-line spacing lost in the rebase's conflict resolution
jat255
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433b1ce
feat(py): read measures from modules, files, and directories
jat255
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d80cbcd
fix(py): first-definition-wins for all source merges, clean sys.modules on import failure
jat255
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a50f890
fix(py): pop, don't del, sys.modules entry on measure-file import failure
jat255
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5dbf8ea
feat(py): allow sibling-file imports for path-loaded measures, guard against name collisions
jat255
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b0ecfb4
fix(py): catch installed-but-unimported name collisions, serialize import machinery access
jat255
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1128364
fix(py): make the import lock reentrant to avoid deadlock on nested semantic_layer() calls
jat255
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f5c7fd7