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https://github.com/Steffo99/unimore-bda-6.git
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75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
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import typing as t
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import contextlib
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import dataclasses
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import logging
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import pymongo
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from .config import TRAINING_SET_SIZE, VALIDATION_SET_SIZE, EVALUATION_SET_SIZE
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from .database import SampleFunc, CachedDatasetFunc, mongo_client_from_config, reviews_collection, store_cache, load_cache, delete_cache
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log = logging.getLogger(__name__)
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@dataclasses.dataclass
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class Caches:
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"""
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Container for the three generators that can create datasets.
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"""
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training: CachedDatasetFunc
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validation: CachedDatasetFunc
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evaluation: CachedDatasetFunc
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@classmethod
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@contextlib.contextmanager
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def from_database_samples(cls, collection: pymongo.collection.Collection, sample_func: SampleFunc) -> t.ContextManager["Caches"]:
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"""
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Create a new caches object from a database collection and a sampling function.
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"""
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log.debug("Gathering datasets...")
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reviews_training = sample_func(collection, TRAINING_SET_SIZE.__wrapped__)
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reviews_validation = sample_func(collection, VALIDATION_SET_SIZE.__wrapped__)
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reviews_evaluation = sample_func(collection, EVALUATION_SET_SIZE.__wrapped__)
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log.debug("Caching datasets...")
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store_cache(reviews_training, "./data/training")
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store_cache(reviews_validation, "./data/validation")
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store_cache(reviews_evaluation, "./data/evaluation")
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log.debug("Loading dataset caches...")
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training_cache = load_cache("./data/training")
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validation_cache = load_cache("./data/validation")
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evaluation_cache = load_cache("./data/evaluation")
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yield Caches(training=training_cache, validation=validation_cache, evaluation=evaluation_cache)
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log.debug("Cleaning up caches...")
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delete_cache("./data/training")
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delete_cache("./data/validation")
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delete_cache("./data/evaluation")
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@staticmethod
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def ensure_clean():
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log.debug("Ensuring there are no leftover caches...")
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try:
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delete_cache("./data/training")
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except FileNotFoundError:
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pass
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try:
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delete_cache("./data/validation")
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except FileNotFoundError:
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pass
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try:
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delete_cache("./data/evaluation")
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except FileNotFoundError:
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pass
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__all__ = (
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"Caches",
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)
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