deps: address required missing key in zarr upgrade #77
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WalkthroughThis update introduces a Changes
Sequence Diagram(s)sequenceDiagram
participant Test
participant ZarrHAMTStore
participant HAMT
Test->>ZarrHAMTStore: Create writable store
ZarrHAMTStore->>HAMT: Initialize with read_only=False
Test->>ZarrHAMTStore: with_read_only(True)
ZarrHAMTStore->>HAMT: Clone HAMT with read_only=True
ZarrHAMTStore-->>Test: Return new read-only store
Test->>ZarrHAMTStore: with_read_only(False)
ZarrHAMTStore->>HAMT: Clone HAMT with read_only=False
ZarrHAMTStore-->>Test: Return new writable store
Estimated code review effort🎯 2 (Simple) | ⏱️ ~8 minutes Poem
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Actionable comments posted: 0
🧹 Nitpick comments (1)
tests/test_with_read_only.py (1)
1-20: LGTM: Solid test coverage for the newwith_read_onlyfunctionality.The test effectively validates:
- Round-trip read-only state toggling (RW → RO → RW)
- Correct
read_onlyflag values after each transition- Clone object identity (ensures new instances are created)
- HAMT root node ID consistency across clones
Consider adding a test case for the fast-path optimization:
def test_with_read_only_fast_path(): # Test that calling with_read_only with same state returns same instance store_rw = ZarrHAMTStore(hamt_rw, read_only=False) same_store = store_rw.with_read_only(False) assert same_store is store_rw # Should be same object, not clone
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⛔ Files ignored due to path filters (1)
uv.lockis excluded by!**/*.lock
📒 Files selected for processing (4)
py_hamt/encryption_hamt_store.py(1 hunks)py_hamt/zarr_hamt_store.py(1 hunks)pyproject.toml(1 hunks)tests/test_with_read_only.py(1 hunks)
🧰 Additional context used
🧠 Learnings (5)
📓 Common learnings
Learnt from: abidsikder
PR: dClimate/py-hamt#7
File: py_hamt/hamt.py:366-367
Timestamp: 2024-12-02T20:09:32.152Z
Learning: In the `py_hamt` HAMT implementation, always obtaining a lock prevents multithreaded reads in read-only mode. To allow multithreaded reads in read-only mode, locks should not be acquired during read operations.
pyproject.toml (3)
Learnt from: abidsikder
PR: #7
File: pyproject.toml:7-13
Timestamp: 2024-12-02T20:05:21.672Z
Learning: When reviewing dependencies in pyproject.toml, note that using open-ended version ranges is acceptable because uv generates lockfiles, preventing future breaking changes from affecting the project.
Learnt from: abidsikder
PR: #7
File: pyproject.toml:19-31
Timestamp: 2024-12-02T20:05:50.327Z
Learning: The project uses a uv lockfile to manage dependencies, ensuring consistent versions and preventing issues with dependency version constraints in pyproject.toml.
Learnt from: abidsikder
PR: #7
File: pyproject.toml:1-6
Timestamp: 2024-12-02T20:06:24.670Z
Learning: The codebase uses Python 3.12's type parameter syntax (PEP 695), making Python >=3.12 a necessary requirement.
py_hamt/encryption_hamt_store.py (1)
Learnt from: abidsikder
PR: #7
File: py_hamt/hamt.py:366-367
Timestamp: 2024-12-02T20:09:32.152Z
Learning: In the py_hamt HAMT implementation, always obtaining a lock prevents multithreaded reads in read-only mode. To allow multithreaded reads in read-only mode, locks should not be acquired during read operations.
tests/test_with_read_only.py (1)
Learnt from: abidsikder
PR: #7
File: py_hamt/hamt.py:366-367
Timestamp: 2024-12-02T20:09:32.152Z
Learning: In the py_hamt HAMT implementation, always obtaining a lock prevents multithreaded reads in read-only mode. To allow multithreaded reads in read-only mode, locks should not be acquired during read operations.
py_hamt/zarr_hamt_store.py (1)
Learnt from: abidsikder
PR: #7
File: py_hamt/hamt.py:366-367
Timestamp: 2024-12-02T20:09:32.152Z
Learning: In the py_hamt HAMT implementation, always obtaining a lock prevents multithreaded reads in read-only mode. To allow multithreaded reads in read-only mode, locks should not be acquired during read operations.
🔇 Additional comments (3)
pyproject.toml (1)
12-12: LGTM: Exact version pinning addresses compatibility requirements.The change from
>=3.0.8to==3.0.9ensures all environments use the exact same zarr version, which aligns with the PR objective of addressing a "required missing key" in the zarr upgrade. Given that the project uses uv lockfiles (as noted in learnings), this exact pinning provides deterministic builds while preventing potential compatibility issues with newer zarr versions.py_hamt/encryption_hamt_store.py (1)
184-202: LGTM: Well-implementedwith_read_onlymethod with proper encryption handling.The implementation correctly:
- Provides fast-path optimization when no state change is needed
- Creates a new HAMT instance with identical configuration but updated
read_onlyflag- Preserves encryption-specific parameters (
encryption_key,header) in the new instance- Uses
type(self)for proper inheritance handling- Maintains synchronous operation without I/O, as expected by Zarr
The override is necessary due to the additional constructor arguments required by this encrypted store variant.
py_hamt/zarr_hamt_store.py (1)
86-111: LGTM: Excellent implementation with comprehensive documentation.The
with_read_onlymethod is well-designed with:
- Clear, comprehensive docstring explaining behavior and design rationale
- Efficient fast-path optimization when no state change is required
- Proper preservation of all immutable HAMT configuration parameters
- Synchronous operation with no I/O, exactly as expected by Zarr
- Correct use of
type(self)for inheritance compatibilityThe implementation provides a clean, lightweight way to toggle read-only state without data duplication or I/O overhead.
Tests work locally but maybe we want to add this to #76 (?) which has more extensive changes to handle possible dangling/unclosed sockets.
Summary by CodeRabbit
New Features
Bug Fixes
Tests
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