feat: Implement LRU Cache algorithm #13520
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algorithms-keeper bot added the require type hints ![algorithms-keeper[bot]](https://avatars.githubusercontent.com/in/235834?s=60&v=4){kind=small}
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data_structures/lru_cache.py Outdated
| | ||
| class Node: | ||
| """A node in the doubly linked list.""" | ||
| def __init__(self, key: int, val: int): |
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Please provide return type hint for the function: __init__. If the function does not return a value, please provide the type hint as: def function() -> None:
data_structures/lru_cache.py Outdated
| >>> cache.get(4) | ||
| 4 | ||
| """ | ||
| def __init__(self, capacity: int): |
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Please provide return type hint for the function: __init__. If the function does not return a value, please provide the type hint as: def function() -> None:
maynkxx force-pushed the feat-lru-cache-implementation branch from eef7e83 to f69ec0e Compare algorithms-keeper bot removed the require type hints maynkxx force-pushed the feat-lru-cache-implementation branch from 1da5a15 to 106bf5f Compare algorithms-keeper bot added the require tests There was a problem hiding this comment.
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| self.head.next = self.tail | ||
| self.tail.prev = self.head | ||
| | ||
| def _remove(self, node: Node) -> None: |
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As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function _remove
| prev.next = nxt | ||
| nxt.prev = prev | ||
| | ||
| def _add(self, node: Node) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function _add
| self.head.next.prev = node | ||
| self.head.next = node | ||
| | ||
| def get(self, key: int) -> int: |
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As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function get
| return node.val | ||
| return -1 | ||
| | ||
| def put(self, key: int, value: int) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function put
maynkxx force-pushed the feat-lru-cache-implementation branch from 61e0d3d to 106bf5f Compare There was a problem hiding this comment.
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@algorithms-keeper reviewto trigger the checks for only added pull request files@algorithms-keeper review-allto trigger the checks for all the pull request files, including the modified files. As we cannot post review comments on lines not part of the diff, this command will post all the messages in one comment.NOTE: Commands are in beta and so this feature is restricted only to a member or owner of the organization.
| self.head.next = self.tail | ||
| self.tail.prev = self.head | ||
| | ||
| def _remove(self, node: Node) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function _remove
| prev.next = nxt | ||
| nxt.prev = prev | ||
| | ||
| def _add(self, node: Node) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function _add
| self.head.next.prev = node | ||
| self.head.next = node | ||
| | ||
| def get(self, key: int) -> int: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function get
| return node.val | ||
| return -1 | ||
| | ||
| def put(self, key: int, value: int) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function put
There was a problem hiding this comment.
Click here to look at the relevant links ⬇️
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Repository:
Python:
Automated review generated by algorithms-keeper. If there's any problem regarding this review, please open an issue about it.
algorithms-keeper commands and options
algorithms-keeper actions can be triggered by commenting on this PR:
@algorithms-keeper reviewto trigger the checks for only added pull request files@algorithms-keeper review-allto trigger the checks for all the pull request files, including the modified files. As we cannot post review comments on lines not part of the diff, this command will post all the messages in one comment.NOTE: Commands are in beta and so this feature is restricted only to a member or owner of the organization.
| self.head.next = self.tail | ||
| self.tail.prev = self.head | ||
| | ||
| def _remove(self, node: Node) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function _remove
| prev.next = nxt | ||
| nxt.prev = prev | ||
| | ||
| def _add(self, node: Node) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function _add
| self.head.next.prev = node | ||
| self.head.next = node | ||
| | ||
| def get(self, key: int) -> int: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function get
| return node.val | ||
| return -1 | ||
| | ||
| def put(self, key: int, value: int) -> None: |
There was a problem hiding this comment.
As there is no test file in this pull request nor any test function or class in the file data_structures/lru_cache.py, please provide doctest for the function put
maynkxx force-pushed the feat-lru-cache-implementation branch from b28944c to 015842b Compare algorithms-keeper bot removed the require tests 
algorithms-keeper bot added tests are failing | This is professional and polite. Hello team, all automated checks have passed. This is now ready for review whenever you have a moment. Thank you! |
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Describe your change:
This pull request introduces an implementation of the LRU (Least Recently Used) Cache. It's a common caching strategy used to manage memory by evicting the least recently accessed items when the cache is full. The implementation uses a hash map for O(1) lookups and a doubly linked list to maintain the usage order.
Checklist:
data_structures).