[ENH] add type hints to _shapelet_transform.py __init__ method

[Datadote]

Reference Issues/PRs

• Part of [DOC] Add type hints for shapelet-based collection transformation. #1910
• References [ENH] Type hints for primitives and string arguments #1454

What does this implement/fix? Explain your changes.

• Add type hints to __init__ method in _shapelet_transform.py

Does your contribution introduce a new dependency? If yes, which one?

• New dependency added: "typing" library

Any other comments?

1. Did not type parallel_backend because one types is "ParallelBackendBase", and did not know how to add that
2. "contract_max_n_shapelet_samples" type -> Union[int, float] because np.inf (float type) is a default
3. "time_limit_in_minutes" type -> Union[int, float] for flexibility. Documentation had int, but default value was 0.0 originally.

[aeon-actions-bot]

Thank you for contributing to aeon

I have added the following labels to this PR based on the title: [ $\color{#FEF1BE}{\textsf{enhancement}}$ ].
I have added the following labels to this PR based on the changes made: [ $\color{#41A8F6}{\textsf{transformations}}$ ]. Feel free to change these if they do not properly represent the PR.

The Checks tab will show the status of our automated tests. You can click on individual test runs in the tab or "Details" in the panel below to see more information if there is a failure.

If our pre-commit code quality check fails, any trivial fixes will automatically be pushed to your PR unless it is a draft.

Don't hesitate to ask questions on the aeon Slack channel if you have any.

PR CI actions

These checkboxes will add labels to enable/disable CI functionality for this PR. This may not take effect immediately, and a new commit may be required to run the new configuration.

• Run pre-commit checks for all files
• Run all pytest tests and configurations
• Run all notebook example tests
• Run numba-disabled codecov tests
• Stop automatic pre-commit fixes (always disabled for drafts)
• Push an empty commit to re-run CI checks

[TonyBagnall]

thanks, I just checked that time limit and contact num shapelets can in fact be ints and floats and its fine

[MatthewMiddlehurst]

Not a blocker, fine with that as is, but is it better to do int or float or just float? I would say float implies integers are also accepted, but it is incredibly minor 🙂

[Datadote]

I agree with Matthew's comment, and updated all "Union[int, float]" to "float".

Sorry to hadifawaz1999 and chrisholder, I wasn't trying to add you all as reviewers. My guess is updating my local branch with (git pull) the new aeon repo commits indirectly added them