JSON Pointer (RFC 6901)

qwen3-30b-a3b

Pythonagenticrun 2sample 01399.9s wall

← run 2 · raw JSON · challenge definitions

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score

tests (60%)—

deliverables (20%)—

content checks (20%)—

qwen3-30b-a3b: timed out

01 what the model was asked

Create jsonpointer.py with exactly one function:

resolve(doc, pointer: str)
    Resolve an RFC 6901 JSON Pointer against doc (nested dicts/lists) and return the referenced value.

Rules:
- The empty pointer "" refers to the whole document.
- A pointer is a sequence of /-prefixed reference tokens: "/a/b" means doc["a"]["b"].
- In a token, the escape ~1 decodes to "/" and ~0 decodes to "~" (decode ~1 before ~0).
- Tokens indexing a list are decimal indices: "/items/0" is the first element.
- Raise KeyError for anything that does not resolve (missing key, bad or out-of-range index, pointer not starting with "/", descending into a scalar).

Use only the Python standard library.

required deliverables + checks

✓deliverable: jsonpointer.py

✓jsonpointer.py must contain “def resolve”

pytest suite it was graded against

test_jsonpointer.py · 56 lines · 996 B

import pytest from jsonpointer import resolve DOC = {    "foo": ["bar", "baz"],    "": 0,    "a/b": 1,    "m~n": 8,    "nested": {"list": [{"x": 42}]},}  def test_whole_document():    assert resolve(DOC, "") is DOC  def test_object_key():    assert resolve(DOC, "/foo") == ["bar", "baz"]  def test_array_index():    assert resolve(DOC, "/foo/0") == "bar"  def test_empty_key():    assert resolve(DOC, "/") == 0  def test_escaped_slash():    assert resolve(DOC, "/a~1b") == 1  def test_escaped_tilde():    assert resolve(DOC, "/m~0n") == 8  def test_deep_path():    assert resolve(DOC, "/nested/list/0/x") == 42  def test_missing_key_raises():    with pytest.raises(KeyError):        resolve(DOC, "/nope")  def test_bad_index_raises():    with pytest.raises(KeyError):        resolve(DOC, "/foo/2")    with pytest.raises(KeyError):        resolve(DOC, "/foo/x")  def test_pointer_without_slash_raises():    with pytest.raises(KeyError):        resolve(DOC, "foo")

02 what it did — full transcript

write_fileturn 1 · jsonpointer.py · 804 B

run_teststurn 2 ·

✗ 1 failing9 passed

! errorqwen3-30b-a3b: timed out

03 what it wrote

files

lines

source lines

functions

classes

cyclomatic

max nesting

26.0

avg fn lines

stdlib imports: none

File	LOC	SLOC	Fns	Complexity	Depth	Imports
jsonpointer.py	26	26	1	11	6	—

jsonpointer.py · 26 lines · 804 B

def resolve(doc, pointer):    if pointer == '':        return doc    if not pointer.startswith('/'):        raise KeyError    tokens = pointer.split('/')[1:]    current = doc    for token in tokens:        token = token.replace('~1', '/').replace('~0', '~')        if token == '':            raise KeyError        if isinstance(current, dict):            if token not in current:                raise KeyError            current = current[token]        elif isinstance(current, list):            try:                index = int(token)                if index < 0 or index >= len(current):                    raise KeyError                current = current[index]            except ValueError:                raise KeyError        else:            raise KeyError    return current

04 how it was graded

✗ error —

model calls

invalid actions

self test runs

10.3k

tokens out

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tokens in

1399.9s

wall time

agent actions: write_file×1, run_tests×1