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John Lancaster
2026-10-10 11:15:08 -05:00
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@@ -148,6 +148,12 @@ assert set(sub["D"]) == {"E"}
assert set(sub["E"]) == {"F"} assert set(sub["E"]) == {"F"}
``` ```
`subgraph()` returns an independent snapshot of the successor closure, including the seeds. Only edges whose endpoints belong to that closure are retained; incoming dependencies from outside it are excluded.
Unlike the earlier shared-set behavior, mutations to a subgraph do not change its parent, and later parent mutations do not change the subgraph. `sub.reverse` remains a live reverse view of the subgraph itself.
Node objects and callback functions are not copied. The subgraph retains the parent's `on_add` and `on_remove` callbacks without invoking them during extraction, so any external side effects of those callbacks remain shared.
## `DAGSetView` as a Standalone Type ## `DAGSetView` as a Standalone Type
`DAGSetView` can also be used directly as a mutable set wrapper. `DAGSetView` can also be used directly as a mutable set wrapper.