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RNA Transcription
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‎rna-transcription/.exercism/config.json‎

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{
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"authors": [
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"BrianHicks"
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],
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"contributors": [
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"behrtam",
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"cmccandless",
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"davepeake",
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"Dog",
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"dvermd",
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"hariesramdhani",
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"ikhadykin",
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"jamesmcm",
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"kytrinyx",
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"lowks",
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"magnus-hogberg",
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"N-Parsons",
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"pheanex",
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"sjakobi",
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"thomasjpfan",
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"tqa236",
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"yawpitch"
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],
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"files": {
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"solution": [
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"rna_transcription.py"
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],
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"test": [
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"rna_transcription_test.py"
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],
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"example": [
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".meta/example.py"
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]
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},
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"blurb": "Given a DNA strand, return its RNA complement.",
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"source": "Hyperphysics",
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"source_url": "https://web.archive.org/web/20220408112140/http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html"
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}

‎rna-transcription/.exercism/metadata.json‎

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{"track":"python","exercise":"rna-transcription","id":"38e6f429fbc54f2186995e3f9a7488b0","url":"https://exercism.org/tracks/python/exercises/rna-transcription","handle":"myFirstCode","is_requester":true,"auto_approve":false}

‎rna-transcription/HELP.md‎

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# Help
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## Running the tests
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We use [pytest][pytest: Getting Started Guide] as our website test runner.
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You will need to install `pytest` on your development machine if you want to run tests for the Python track locally.
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You should also install the following `pytest` plugins:
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- [pytest-cache][pytest-cache]
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- [pytest-subtests][pytest-subtests]
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Extended information can be found in our website [Python testing guide][Python track tests page].
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### Running Tests
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To run the included tests, navigate to the folder where the exercise is stored using `cd` in your terminal (_replace `{exercise-folder-location}` below with your path_).
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Test files usually end in `_test.py`, and are the same tests that run on the website when a solution is uploaded.
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Linux/MacOS
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```bash
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$ cd {path/to/exercise-folder-location}
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```
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Windows
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```powershell
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PS C:\Users\foobar> cd {path\to\exercise-folder-location}
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```
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<br>
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Next, run the `pytest` command in your terminal, replacing `{exercise_test.py}` with the name of the test file:
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Linux/MacOS
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```bash
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$ python3 -m pytest -o markers=task {exercise_test.py}
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==================== 7 passed in 0.08s ====================
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```
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Windows
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```powershell
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PS C:\Users\foobar> py -m pytest -o markers=task {exercise_test.py}
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==================== 7 passed in 0.08s ====================
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```
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### Common options
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- `-o` : override default `pytest.ini` (_you can use this to avoid marker warnings_)
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- `-v` : enable verbose output.
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- `-x` : stop running tests on first failure.
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- `--ff` : run failures from previous test before running other test cases.
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For additional options, use `python3 -m pytest -h` or `py -m pytest -h`.
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### Fixing warnings
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If you do not use `pytest -o markers=task` when invoking `pytest`, you might receive a `PytestUnknownMarkWarning` for tests that use our new syntax:
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```bash
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PytestUnknownMarkWarning: Unknown pytest.mark.task - is this a typo? You can register custom marks to avoid this warning - for details, see https://docs.pytest.org/en/stable/mark.html
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```
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To avoid typing `pytest -o markers=task` for every test you run, you can use a `pytest.ini` configuration file.
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We have made one that can be downloaded from the top level of the Python track directory: [pytest.ini][pytest.ini].
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You can also create your own `pytest.ini` file with the following content:
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```ini
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[pytest]
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markers =
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task: A concept exercise task.
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```
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Placing the `pytest.ini` file in the _root_ or _working_ directory for your Python track exercises will register the marks and stop the warnings.
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More information on pytest marks can be found in the `pytest` documentation on [marking test functions][pytest: marking test functions with attributes] and the `pytest` documentation on [working with custom markers][pytest: working with custom markers].
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Information on customizing pytest configurations can be found in the `pytest` documentation on [configuration file formats][pytest: configuration file formats].
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### Extending your IDE or Code Editor
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Many IDEs and code editors have built-in support for using `pytest` and other code quality tools.
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Some community-sourced options can be found on our [Python track tools page][Python track tools page].
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[Pytest: Getting Started Guide]: https://docs.pytest.org/en/latest/getting-started.html
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[Python track tools page]: https://exercism.org/docs/tracks/python/tools
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[Python track tests page]: https://exercism.org/docs/tracks/python/tests
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[pytest-cache]:http://pythonhosted.org/pytest-cache/
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[pytest-subtests]:https://github.com/pytest-dev/pytest-subtests
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[pytest.ini]: https://github.com/exercism/python/blob/main/pytest.ini
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[pytest: configuration file formats]: https://docs.pytest.org/en/6.2.x/customize.html#configuration-file-formats
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[pytest: marking test functions with attributes]: https://docs.pytest.org/en/6.2.x/mark.html#raising-errors-on-unknown-marks
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[pytest: working with custom markers]: https://docs.pytest.org/en/6.2.x/example/markers.html#working-with-custom-markers
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## Submitting your solution
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You can submit your solution using the `exercism submit rna_transcription.py` command.
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This command will upload your solution to the Exercism website and print the solution page's URL.
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It's possible to submit an incomplete solution which allows you to:
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- See how others have completed the exercise
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- Request help from a mentor
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## Need to get help?
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If you'd like help solving the exercise, check the following pages:
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- The [Python track's documentation](https://exercism.org/docs/tracks/python)
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- The [Python track's programming category on the forum](https://forum.exercism.org/c/programming/python)
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- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
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- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
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Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
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Below are some resources for getting help if you run into trouble:
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- [The PSF](https://www.python.org) hosts Python downloads, documentation, and community resources.
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- [The Exercism Community on Discord](https://exercism.org/r/discord)
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- [Python Community on Discord](https://pythondiscord.com/) is a very helpful and active community.
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- [/r/learnpython/](https://www.reddit.com/r/learnpython/) is a subreddit designed for Python learners.
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- [#python on Libera.chat](https://www.python.org/community/irc/) this is where the core developers for the language hang out and get work done.
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- [Python Community Forums](https://discuss.python.org/)
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- [Free Code Camp Community Forums](https://forum.freecodecamp.org/)
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- [CodeNewbie Community Help Tag](https://community.codenewbie.org/t/help)
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- [Pythontutor](http://pythontutor.com/) for stepping through small code snippets visually.
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Additionally, [StackOverflow](http://stackoverflow.com/questions/tagged/python) is a good spot to search for your problem/question to see if it has been answered already.
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If not - you can always [ask](https://stackoverflow.com/help/how-to-ask) or [answer](https://stackoverflow.com/help/how-to-answer) someone else's question.

‎rna-transcription/README.md‎

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# RNA Transcription
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Welcome to RNA Transcription on Exercism's Python Track.
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If you need help running the tests or submitting your code, check out `HELP.md`.
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## Introduction
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You work for a bioengineering company that specializes in developing therapeutic solutions.
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Your team has just been given a new project to develop a targeted therapy for a rare type of cancer.
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~~~~exercism/note
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It's all very complicated, but the basic idea is that sometimes people's bodies produce too much of a given protein.
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That can cause all sorts of havoc.
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But if you can create a very specific molecule (called a micro-RNA), it can prevent the protein from being produced.
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This technique is called [RNA Interference][rnai].
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[rnai]: https://admin.acceleratingscience.com/ask-a-scientist/what-is-rnai/
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~~~~
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## Instructions
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Your task is to determine the RNA complement of a given DNA sequence.
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Both DNA and RNA strands are a sequence of nucleotides.
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The four nucleotides found in DNA are adenine (**A**), cytosine (**C**), guanine (**G**), and thymine (**T**).
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The four nucleotides found in RNA are adenine (**A**), cytosine (**C**), guanine (**G**), and uracil (**U**).
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Given a DNA strand, its transcribed RNA strand is formed by replacing each nucleotide with its complement:
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- `G` -> `C`
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- `C` -> `G`
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- `T` -> `A`
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- `A` -> `U`
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~~~~exercism/note
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If you want to look at how the inputs and outputs are structured, take a look at the examples in the test suite.
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~~~~
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## Source
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### Created by
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- @BrianHicks
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### Contributed to by
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- @behrtam
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- @cmccandless
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- @davepeake
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- @Dog
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- @dvermd
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- @hariesramdhani
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- @ikhadykin
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- @jamesmcm
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- @kytrinyx
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- @lowks
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- @magnus-hogberg
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- @N-Parsons
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- @pheanex
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- @sjakobi
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- @thomasjpfan
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- @tqa236
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- @yawpitch
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### Based on
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Hyperphysics - https://web.archive.org/web/20220408112140/http://hyperphysics.phy-astr.gsu.edu/hbase/Organic/transcription.html

‎rna-transcription/rna_transcription.py‎

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"""Your task is to determine the RNA complement of a given DNA sequence."""
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DNA = {
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"G": "C",
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"C": "G",
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"T": "A",
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"A": "U",
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}
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def to_rna(dna_strand: str) -> str:
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"""
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Determine the RNA complement for a DNA strand.
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:param dna_strand: DNA sequence containing only
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'G', 'C', 'T', or 'A' (case-insensitive).
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:return: RNA complement string using 'C', 'G', 'A',
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and 'U' (uppercase).
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:raises KeyError: If dna_strand contains any character
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other than 'G', 'C', 'T', or 'A'.
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"""
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return "".join(DNA[char] for char in dna_strand.upper())

‎rna-transcription/rna_transcription_test.py‎

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# pylint: disable=C0301, C0114, C0115, C0116, R0904
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# These tests are auto-generated with test data from:
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# https://github.com/exercism/problem-specifications/tree/main/exercises/rna-transcription/canonical-data.json
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# File last updated on 2023-07-19
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import unittest
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from rna_transcription import (
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to_rna,
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)
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class RnaTranscriptionTest(unittest.TestCase):
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def test_empty_rna_sequence(self):
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self.assertEqual(to_rna(""), "")
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def test_rna_complement_of_cytosine_is_guanine(self):
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self.assertEqual(to_rna("C"), "G")
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def test_rna_complement_of_guanine_is_cytosine(self):
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self.assertEqual(to_rna("G"), "C")
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def test_rna_complement_of_thymine_is_adenine(self):
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self.assertEqual(to_rna("T"), "A")
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def test_rna_complement_of_adenine_is_uracil(self):
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self.assertEqual(to_rna("A"), "U")
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def test_rna_complement(self):
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self.assertEqual(to_rna("ACGTGGTCTTAA"), "UGCACCAGAAUU")

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