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Prebuilt registry๏
๐ข Beginner ยท Lesson 33
A registry of ready-made same-typed objects. Spell names must be unique per book (probe-proven), so N instances of one class bind as ONE registry spell - the dict is the spell, lookup stays yours.
Before you run๏
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๏
python UX_and_AIX_experiences/01_beginner/33_prebuilt_registry.py
py -3.14t UX_and_AIX_experiences/01_beginner/33_prebuilt_registry.py
Public surface๏
collection-as-instance-spell, read permission
Code๏
1"""
2TIER: beginner (33)
3GOAL: A registry of ready-made same-typed objects. Spell names must be
4 unique per book (probe-proven), so N instances of one class bind
5 as ONE registry spell - the dict is the spell, lookup stays yours.
6SURFACE EXERCISED: collection-as-instance-spell, read permission
7"""
8import melder as md
9
10
11class Palette:
12 def __init__(self, name: str) -> None:
13 self.name = name
14
15
16def main() -> None:
17 book = md.Spellbook()
18 palettes = {p.name: p for p in
19 (Palette("dark"), Palette("light"), Palette("contrast"))}
20 book.bind(spell=palettes, existence="unique",
21 spellframe="ui", binding_name="palettes")
22 conduit = book.conjure()
23
24 registry = conduit.meld(spellframe="ui", binding_name="palettes")
25 assert registry is palettes
26 assert registry["dark"].name == "dark"
27 print("registry spell served:", sorted(registry))
28
29
30if __name__ == "__main__":
31 main()
Check the outcome๏
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.