py-12-txn-kvstore
0.500
Proposed solution
```python
class KVStore:
def __init__(self):
self.store = {}
self.transactions = []
def get(self, key):
for transaction in reversed(self.transactions):
if key in transaction:
return transaction[key]
return self.store.get(key)
def set(self, key, value):
if self.transactions:
self.transactions[-1][key] = value
else:
self.store[key] = value
def delete(self, key):
if self.transactions:
self.transactions[-1].pop(key, None)
else:
self.store.pop(key, None)
def keys(self):
visible_keys = set()
for transaction in reversed(self.transactions):
visible_keys.update(transaction.keys())
visible_keys.update(self.store.keys())
return sorted(visible_keys)
def __len__(self):
return len(self.keys())
def begin(self):
self.transactions.append({})
def commit(self):
if not self.transactions:
raise RuntimeError("No open transaction to commit.")
if len(self.transactions) == 1:
self.transactions.clear()
else:
self.transactions[-2].update(self.transactions.pop())
def rollback(self):
if not self.transactions:
raise RuntimeError("No open transaction to rollback.")
self.transactions.pop()
```Test output (stdout)
..F.FFF...FF [100%]
=================================== FAILURES ===================================
____________________ test_transaction_isolation_then_commit ____________________
def test_transaction_isolation_then_commit():
s = KVStore()
s.set("a", 1)
s.begin()
s.set("a", 2)
s.set("b", 3)
assert s.get("a") == 2
assert s.get("b") == 3
s.commit()
> assert s.get("a") == 2
E AssertionError: assert 1 == 2
E + where 1 = get('a')
E + where get = <solution.KVStore object at 0x787f33621c40>.get
test_kvstore.py:39: AssertionError
__________________ test_delete_within_transaction_is_isolated __________________
def test_delete_within_transaction_is_isolated():
s = KVStore()
s.set("a", 1)
s.begin()
s.delete("a")
> assert s.get("a") is None
E AssertionError: assert 1 is None
E + where 1 = get('a')
E + where get = <solution.KVStore object at 0x787f334b0770>.get
test_kvstore.py:60: AssertionError
_______________ test_commit_propagates_delete_to_committed_store _______________
def test_commit_propagates_delete_to_committed_store():
s = KVStore()
s.set("a", 1)
s.begin()
s.delete("a")
s.commit()
> assert s.get("a") is None
E AssertionError: assert 1 is None
E + where 1 = get('a')
E + where get = <solution.KVStore object at 0x787f3342c530>.get
test_kvstore.py:73: AssertionError
___________________ test_nested_transactions_inner_rollback ____________________
def test_nested_transactions_inner_rollback():
s = KVStore()
s.set("a", 1)
s.begin()
s.set("a", 2)
s.set("b", 3)
s.begin()
s.delete("a")
> assert s.get("a") is None
E AssertionError: assert 2 is None
E + where 2 = get('a')
E + where get = <solution.KVStore object at 0x787f334b1a00>.get
test_kvstore.py:85: AssertionError
____________________ test_deep_nesting_visibility_and_merge ____________________
def test_deep_nesting_visibility_and_merge():
s = KVStore()
s.set("k", 0)
for depth in range(1, 6):
s.begin()
s.set("k", depth)
assert s.get("k") == depth
# commit all five layers down to the base
for _ in range(5):
s.commit()
> assert s.get("k") == 5
E AssertionError: assert 0 == 5
E + where 0 = get('k')
E + where get = <solution.KVStore object at 0x787f3342c920>.get
test_kvstore.py:132: AssertionError
______________ test_reset_value_after_delete_in_same_transaction _______________
def test_reset_value_after_delete_in_same_transaction():
s = KVStore()
s.set("a", 1)
s.begin()
s.delete("a")
s.set("a", 7) # re-add after delete within the same transaction
assert s.get("a") == 7
s.commit()
> assert s.get("a") == 7
E AssertionError: assert 1 == 7
E + where 1 = get('a')
E + where get = <solution.KVStore object at 0x787f3342d070>.get
test_kvstore.py:144: AssertionError
=========================== short test summary info ============================
FAILED test_kvstore.py::test_transaction_isolation_then_commit - AssertionErr...
FAILED test_kvstore.py::test_delete_within_transaction_is_isolated - Assertio...
FAILED test_kvstore.py::test_commit_propagates_delete_to_committed_store - As...
FAILED test_kvstore.py::test_nested_transactions_inner_rollback - AssertionEr...
FAILED test_kvstore.py::test_deep_nesting_visibility_and_merge - AssertionErr...
FAILED test_kvstore.py::test_reset_value_after_delete_in_same_transaction - A...
6 failed, 6 passed in 0.03s
Self-repair attempts
[
{
"total": 12,
"answer": "```python\nclass KVStore:\n def __init__(self):\n self.store = {}\n self.transactions = []\n\n def get(self, key):\n for transaction in reversed(self.transactions):\n if key in transaction:\n return transaction[key]\n return self.store.get(key)\n\n def set(self, key, value):\n if self.transactions:\n self.transactions[-1][key] = value\n else:\n self.store[key] = value\n\n def delete(self, key):\n if self.transactions:\n self.transactions[-1].pop(key, None)\n else:\n self.store.pop(key, None)\n\n def keys(self):\n visible_keys = set()\n for transaction in reversed(self.transactions):\n visible_keys.update(transaction.keys())\n visible_keys.update(self.store.keys())\n return sorted(visible_keys)\n\n def __len__(self):\n return len(self.keys())\n\n def begin(self):\n self.transactions.append({})\n\n def commit(self):\n if not self.transactions:\n raise RuntimeError(\"No open transaction to commit.\")\n if len(self.transactions) == 1:\n self.transactions.clear()\n else:\n self.transactions[-2].update(self.transactions.pop())\n\n def rollback(self):\n if not self.transactions:\n raise RuntimeError(\"No open transaction to rollback.\")\n self.transactions.pop()\n```",
"passed": 6,
"test_error": " s.commit()\n> assert s.get(\"a\") is None\nE AssertionError: assert 1 is None\nE + where 1 = get('a')\nE + where get = <solution.KVStore object at 0x787f3342c530>.get\n\ntest_kvstore.py:73: AssertionError\n___________________ test_nested_transactions_inner_rollback ____________________\n\n def test_nested_transactions_inner_rollback():\n s = KVStore()\n s.set(\"a\", 1)\n s.begin()\n s.set(\"a\", 2)\n s.set(\"b\", 3)\n s.begin()\n s.delete(\"a\")\n> assert s.get(\"a\") is None\nE AssertionError: assert 2 is None\nE + where 2 = get('a')\nE + where get = <solution.KVStore object at 0x787f334b1a00>.get\n\ntest_kvstore.py:85: AssertionError\n____________________ test_deep_nesting_visibility_and_merge ____________________\n\n def test_deep_nesting_visibility_and_merge():\n s = KVStore()\n s.set(\"k\", 0)\n for depth in range(1, 6):\n s.begin()\n s.set(\"k\", depth)\n assert s.get(\"k\") == depth\n # commit all five layers down to the base\n for _ in range(5):\n s.commit()\n> assert s.get(\"k\") == 5\nE AssertionError: assert 0 == 5\nE + where 0 = get('k')\nE + where get = <solution.KVStore object at 0x787f3342c920>.get\n\ntest_kvstore.py:132: AssertionError\n______________ test_reset_value_after_delete_in_same_transaction _______________\n\n def test_reset_value_after_delete_in_same_transaction():\n s = KVStore()\n s.set(\"a\", 1)\n s.begin()\n s.delete(\"a\")\n s.set(\"a\", 7) # re-add after delete within the same transaction\n assert s.get(\"a\") == 7\n s.commit()\n> assert s.get(\"a\") == 7\nE AssertionError: assert 1 == 7\nE + where 1 = get('a')\nE + where get = <solution.KVStore object at 0x787f3342d070>.get\n\ntest_kvstore.py:144: AssertionError\n=========================== short test summary info ============================\nFAILED test_kvstore.py::test_transaction_isolation_then_commit - AssertionErr...\nFAILED test_kvstore.py::test_delete_within_transaction_is_isolated - Assertio...\nFAILED test_kvstore.py::test_commit_propagates_delete_to_committed_store - As...\nFAILED test_kvstore.py::test_nested_transactions_inner_rollback - AssertionEr...\nFAILED test_kvstore.py::test_deep_nesting_visibility_and_merge - AssertionErr...\nFAILED test_kvstore.py::test_reset_value_after_delete_in_same_transaction - A...\n6 failed, 6 passed in 0.03s"
},
{
"total": 12,
"answer": "```python\nclass KVStore:\n def __init__(self):\n self.store = {}\n self.transactions = []\n\n def get(self, key):\n for transaction in reversed(self.transactions):\n if key in transaction:\n return transaction[key]\n return self.store.get(key)\n\n def set(self, key, value):\n if self.transactions:\n self.transactions[-1][key] = value\n else:\n self.store[key] = value\n\n def delete(self, key):\n if self.transactions:\n self.transactions[-1].pop(key, None)\n else:\n self.store.pop(key, None)\n\n def keys(self):\n visible_keys = set()\n for transaction in reversed(self.transactions):\n visible_keys.update(transaction.keys())\n visible_keys.update(self.store.keys())\n return sorted(visible_keys)\n\n def __len__(self):\n return len(self.keys())\n\n def begin(self):\n self.transactions.append({})\n\n def commit(self):\n if not self.transactions:\n raise RuntimeError(\"No open transaction to commit.\")\n if len(self.transactions) == 1:\n self.transactions.clear()\n else:\n self.transactions[-2].update(self.transactions.pop())\n\n def rollback(self):\n if not self.transactions:\n raise RuntimeError(\"No open transaction to rollback.\")\n self.transactions.pop()\n```",
"passed": 6,
"test_error": " s.commit()\n> assert s.get(\"a\") is None\nE AssertionError: assert 1 is None\nE + where 1 = get('a')\nE + where get = <solution.KVStore object at 0x7683c5944470>.get\n\ntest_kvstore.py:73: AssertionError\n___________________ test_nested_transactions_inner_rollback ____________________\n\n def test_nested_transactions_inner_rollback():\n s = KVStore()\n s.set(\"a\", 1)\n s.begin()\n s.set(\"a\", 2)\n s.set(\"b\", 3)\n s.begin()\n s.delete(\"a\")\n> assert s.get(\"a\") is None\nE AssertionError: assert 2 is None\nE + where 2 = get('a')\nE + where get = <solution.KVStore object at 0x7683c59cd460>.get\n\ntest_kvstore.py:85: AssertionError\n____________________ test_deep_nesting_visibility_and_merge ____________________\n\n def test_deep_nesting_visibility_and_merge():\n s = KVStore()\n s.set(\"k\", 0)\n for depth in range(1, 6):\n s.begin()\n s.set(\"k\", depth)\n assert s.get(\"k\") == depth\n # commit all five layers down to the base\n for _ in range(5):\n s.commit()\n> assert s.get(\"k\") == 5\nE AssertionError: assert 0 == 5\nE + where 0 = get('k')\nE + where get = <solution.KVStore object at 0x7683c59448c0>.get\n\ntest_kvstore.py:132: AssertionError\n______________ test_reset_value_after_delete_in_same_transaction _______________\n\n def test_reset_value_after_delete_in_same_transaction():\n s = KVStore()\n s.set(\"a\", 1)\n s.begin()\n s.delete(\"a\")\n s.set(\"a\", 7) # re-add after delete within the same transaction\n assert s.get(\"a\") == 7\n s.commit()\n> assert s.get(\"a\") == 7\nE AssertionError: assert 1 == 7\nE + where 1 = get('a')\nE + where get = <solution.KVStore object at 0x7683c5944fb0>.get\n\ntest_kvstore.py:144: AssertionError\n=========================== short test summary info ============================\nFAILED test_kvstore.py::test_transaction_isolation_then_commit - AssertionErr...\nFAILED test_kvstore.py::test_delete_within_transaction_is_isolated - Assertio...\nFAILED test_kvstore.py::test_commit_propagates_delete_to_committed_store - As...\nFAILED test_kvstore.py::test_nested_transactions_inner_rollback - AssertionEr...\nFAILED test_kvstore.py::test_deep_nesting_visibility_and_merge - AssertionErr...\nFAILED test_kvstore.py::test_reset_value_after_delete_in_same_transaction - A...\n6 failed, 6 passed in 0.03s"
},
{
"total": 12,
"answer": "```python\nclass KVStore:\n def __init__(self):\n self.store = {}\n self.transactions = []\n\n def get(self, key):\n for transaction in reversed(self.transactions):\n if key in transaction:\n return transaction[key]\n return self.store.get(key)\n\n def set(self, key, value):\n if self.transactions:\n self.transactions[-1][key] = value\n else:\n self.store[key] = value\n\n def delete(self, key):\n if self.transactions:\n self.transactions[-1].pop(key, None)\n else:\n self.store.pop(key, None)\n\n def keys(self):\n visible_keys = set()\n for transaction in reversed(self.transactions):\n visible_keys.update(transaction.keys())\n visible_keys.update(self.store.keys())\n return sorted(visible_keys)\n\n def __len__(self):\n return len(self.keys())\n\n def begin(self):\n self.transactions.append({})\n\n def commit(self):\n if not self.transactions:\n raise RuntimeError(\"No open transaction to commit.\")\n if len(self.transactions) == 1:\n self.transactions.clear()\n else:\n self.transactions[-2].update(self.transactions.pop())\n\n def rollback(self):\n if not self.transactions:\n raise RuntimeError(\"No open transaction to rollback.\")\n self.transactions.pop()\n```",
"passed": 6,
"test_error": ""
}
]System prompt
You are an expert programmer. Solve the task exactly as specified. Output your solution as fenced code blocks using the required file name(s) and the exact function/type signatures requested. Prefer correctness; do not include prose outside code unless asked.