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Existence unique per conduit๏ƒ

๐ŸŸข Beginner ยท Lesson 15

unique_per_conduit - each conduit scope holds its OWN single instance; stable inside the scope, separate across scopes.

Before you run๏ƒ

Use the Beginner guide for prerequisite concepts. Run from a checkout with Melder installed and Python 3.14 free-threading selected. The collection download includes the level's local helper modules.

Run the saved script๏ƒ

python UX_and_AIX_experiences/01_beginner/15_existence_unique_per_conduit.py

py -3.14t UX_and_AIX_experiences/01_beginner/15_existence_unique_per_conduit.py

Download this collection ยท Source on GitHub

Public surface๏ƒ

md.Existence.unique_per_conduit

Code๏ƒ

 1"""
 2TIER: beginner (15)
 3GOAL: unique_per_conduit - each conduit scope holds its OWN single instance;
 4      stable inside the scope, separate across scopes.
 5SURFACE EXERCISED: md.Existence.unique_per_conduit
 6"""
 7import melder as md
 8
 9
10class ScopeLocalSession:
11    pass
12
13
14def main() -> None:
15    book = md.Spellbook()
16    book.bind(spell=ScopeLocalSession, existence="unique_per_conduit")
17    root = book.conjure()
18    child_a = root.create_lesser_conduit()
19    child_b = root.create_lesser_conduit()
20
21    a1, a2 = child_a.meld(spell=ScopeLocalSession), child_a.meld(spell=ScopeLocalSession)
22    b1 = child_b.meld(spell=ScopeLocalSession)
23    r1 = root.meld(spell=ScopeLocalSession)
24    assert a1 is a2
25    assert len({id(a1), id(b1), id(r1)}) == 3
26    print("unique_per_conduit: stable within a scope, three scopes = three instances")
27
28
29if __name__ == "__main__":
30    main()

Check the outcome๏ƒ

The script contains its own assertions or demonstrated refusal paths. Run it to evaluate those checks against your installed version. The code above is taken directly from the saved file; no run output is invented here.

More beginner examples ยท Level guide

API contracts๏ƒ