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* pre-commit: Upgrade psf/black for stable style 2023 Updating https://github.com/psf/black ... updating 22.12.0 -> 23.1.0 for their `2023 stable style`. * https://github.com/psf/black/blob/main/CHANGES.md#2310 > This is the first [psf/black] release of 2023, and following our stability policy, it comes with a number of improvements to our stable style… Also, add https://github.com/tox-dev/pyproject-fmt and https://github.com/abravalheri/validate-pyproject to pre-commit. I only modified `.pre-commit-config.yaml` and all other files were modified by pre-commit.ci and psf/black. * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
31 lines
555 B
Python
31 lines
555 B
Python
import re
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def dna(dna: str) -> str:
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"""
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https://en.wikipedia.org/wiki/DNA
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Returns the second side of a DNA strand
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>>> dna("GCTA")
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'CGAT'
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>>> dna("ATGC")
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'TACG'
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>>> dna("CTGA")
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'GACT'
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>>> dna("GFGG")
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Traceback (most recent call last):
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...
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ValueError: Invalid Strand
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"""
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if len(re.findall("[ATCG]", dna)) != len(dna):
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raise ValueError("Invalid Strand")
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return dna.translate(dna.maketrans("ATCG", "TAGC"))
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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