Dynamic programming/matrix chain multiplication #10562
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When would the algorithm be used in the real-world? |
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Adding some real world applications of the algorithm in docstring. |
Add a non-dp solution with benchmarks.
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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function a
Please provide return type hint for the function: a. If the function does not return a value, please provide the type hint as: def function() -> None:
Please provide descriptive name for the function: a
Please provide type hint for the parameter: i
Please provide descriptive name for the parameter: i
Please provide type hint for the parameter: j
Please provide descriptive name for the parameter: j
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| def elapsed_time(msg: str) -> None: |
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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function elapsed_time
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| """ | ||
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| @cache | ||
| def a(i, j): |
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 dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function a
Please provide return type hint for the function: a. If the function does not return a value, please provide the type hint as: def function() -> None:
Please provide descriptive name for the function: a
Please provide type hint for the parameter: i
Please provide descriptive name for the parameter: i
Please provide type hint for the parameter: j
Please provide descriptive name for the parameter: j
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| @contextmanager | ||
| def elapsed_time(msg: str) -> Iterator: |
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 dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function elapsed_time
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.
| """ | ||
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| @cache | ||
| def a(i, j): |
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 dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function a
Please provide return type hint for the function: a. If the function does not return a value, please provide the type hint as: def function() -> None:
Please provide descriptive name for the function: a
Please provide type hint for the parameter: i
Please provide descriptive name for the parameter: i
Please provide type hint for the parameter: j
Please provide descriptive name for the parameter: j
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| @contextmanager | ||
| def elapsed_time(msg: str) -> Iterator: |
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 dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function elapsed_time
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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.
| """ | ||
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| @cache | ||
| def a(i: int, j: 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 dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function a
Please provide descriptive name for the function: a
Please provide descriptive name for the parameter: i
Please provide descriptive name for the parameter: j
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| @contextmanager | ||
| def elapsed_time(msg: str) -> Iterator: |
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 dynamic_programming/matrix_chain_multiplication.py, please provide doctest for the function elapsed_time
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tianyizheng02’s stale review
The algorithm is framed in the same way on Wikipedia. There are two different algorithms with benchmarks.
* updating DIRECTORY.md * spell changes * updating DIRECTORY.md * real world applications * updating DIRECTORY.md * Update matrix_chain_multiplication.py Add a non-dp solution with benchmarks. * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update matrix_chain_multiplication.py * Update matrix_chain_multiplication.py * Update matrix_chain_multiplication.py --------- Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com> Co-authored-by: Pooja Sharma <poojasharma@MyBigMac.local> Co-authored-by: Christian Clauss <cclauss@me.com> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Describe your change:
Checklist:
P.s. I would like to add that I started by trying to add doctests to matrix_chain_order.py script under Python/dynamic_programming/matrix_chain_order in order to improve its test coverage. However, I found the functions poorly written. Instead of changing the code, I have written a separate script with bug free code, problem explanation and required doctests. Moderators may consider deleting matrix_chain_order.py. Creating new PR by deleting #10549 and #10561.