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* ci(pre-commit): Add pep8-naming to `pre-commit` hooks (#7038) * refactor: Fix naming conventions (#7038) * Update arithmetic_analysis/lu_decomposition.py Co-authored-by: Christian Clauss <cclauss@me.com> * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * refactor(lu_decomposition): Replace `NDArray` with `ArrayLike` (#7038) * chore: Fix naming conventions in doctests (#7038) * fix: Temporarily disable project euler problem 104 (#7069) * chore: Fix naming conventions in doctests (#7038) Co-authored-by: Christian Clauss <cclauss@me.com> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
47 lines
1.2 KiB
Python
47 lines
1.2 KiB
Python
"""
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This is a pure Python implementation of the radix sort algorithm
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Source: https://en.wikipedia.org/wiki/Radix_sort
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"""
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from __future__ import annotations
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def radix_sort(list_of_ints: list[int]) -> list[int]:
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"""
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Examples:
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>>> radix_sort([0, 5, 3, 2, 2])
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[0, 2, 2, 3, 5]
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>>> radix_sort(list(range(15))) == sorted(range(15))
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True
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>>> radix_sort(list(range(14,-1,-1))) == sorted(range(15))
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True
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>>> radix_sort([1,100,10,1000]) == sorted([1,100,10,1000])
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True
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"""
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RADIX = 10 # noqa: N806
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placement = 1
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max_digit = max(list_of_ints)
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while placement <= max_digit:
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# declare and initialize empty buckets
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buckets: list[list] = [list() for _ in range(RADIX)]
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# split list_of_ints between the buckets
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for i in list_of_ints:
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tmp = int((i / placement) % RADIX)
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buckets[tmp].append(i)
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# put each buckets' contents into list_of_ints
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a = 0
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for b in range(RADIX):
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for i in buckets[b]:
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list_of_ints[a] = i
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a += 1
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# move to next
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placement *= RADIX
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return list_of_ints
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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