[ENH] Type hints for primitives and string arguments

[TonyBagnall]

Describe the feature or idea you want to propose

we would like to increase the use of type hints, and a good first issue is to add them for the simplest case when arguments are primitives (int, float, bool) or strings. Pick a package, look through the code and add type hints. Just for primitives for now, more complex types need a bit of thought. Many have npt.ArrayLike types, but we have not decided on standardising on that, so leave these alone. Dont feel you have to do them all, this is a good first issue to get you started.

Describe your proposed solution

for example, the constructor for the anomaly detection algorithm STRAY has these type hints

    def __init__(
        self,
        alpha: float = 0.01,
        k: int = 10,
        knn_algorithm: str = "brute",
        p: float = 0.5,
        size_threshold: int = 50,
        outlier_tail: str = "max",
    ):

but the segmentation algorithm CLASP does not

def _is_trivial_match(candidate, change_points, n_timepoints, exclusion_radius=0.05):
    """Check if a candidate change point is in close proximity to other change points.

Describe alternatives you've considered, if relevant

No response

Additional context

No response

[nileenagp]

Hello,

I would like to start on this issue. I am taking up "aeon.classification.distance_based._time_series_neighbors.py" script to start with.

[nileenagp]

@all-contributors please add @nileenagp for Code

[allcontributors]

@nileenagp

I've put up a pull request to add @nileenagp! 🎉

[nileenagp]

Hello,
I have a doubt here. If I need to use Type[keras.optimizers.Optimizer] in type hints for a parameter, Is it allowed to import "keras" as per the project standards, when it is not required anywhere else in the script?

[MatthewMiddlehurst]

No, if the dependency is optional it should not be imported at the top level of a file. This would exclude it from specific type hints like that I imagine.

[nileenagp]

Thanks for the confirmation, I will leave that type hint for now.

[YashviMehta03]

Hello @TonyBagnall , is this issue still open to work on ?
I would like to work on it , could you please assign it.

Thank you!

[MatthewMiddlehurst]

Hi @YashviMehta03, this one is a bit too big for a single person really. I would post here selecting a part of the package you want to add type hints too and go from there.

[YashviMehta03]

Hello @MatthewMiddlehurst , yes right.
So to start with, these are the modules where I could add type hints since they are missing :

1. all the .py files under the following directories :
   aeon/classification/convolution_based
   aeon/classification/feature_based

2. this particular file
   aeon/classification/early_classification/_probability_threshold.py

I would like to work on it , could you assign it?