test.py

import os
from pdb import set_trace

import datasets
import pandas as pd

_CITATION = """\
Put your dataset citation here.
"""

_DESCRIPTION = """\
Description of your dataset goes here.
"""

_HOMEPAGE = "https://your-dataset-homepage.com"

_LICENSE = "License information goes here."


class Test(datasets.GeneratorBasedBuilder):
    """Your dataset description"""

    BUILDER_CONFIGS = [
        datasets.BuilderConfig(
            name="customers", 
            version=datasets.Version("1.0.0"), 
            description="This is subset A"),
        datasets.BuilderConfig(
            name="products", 
            version=datasets.Version("1.0.0"), 
            description="This is subset B"),
    ]

    def _info(self):
        # set_trace()
        if self.config.name == "customers":
            features = datasets.Features(
                {
                    "customer_id": datasets.Value("int64"),
                    "name": datasets.Value("string"),
                    "age": datasets.Value("int64"),
                }
            )
        elif self.config.name == "products":
            features = datasets.Features(
                {
                    "product_id": datasets.Value("int64"),
                    "name": datasets.Value("string"),
                    "price": datasets.Value("double"),
                }
            )
        else:
            raise ValueError(f"Unknown subset: {self.config.name}")

        return datasets.DatasetInfo(
            description=_DESCRIPTION,
            features=features,
            supervised_keys=None,
            homepage=_HOMEPAGE,
            license=_LICENSE,
            citation=_CITATION,
        )

    def _split_generators(self, dl_manager):
        data_dir = dl_manager.manual_dir or "./"
        data_dir = os.path.join(data_dir, self.config.name)
        print(data_dir)
        return [
            datasets.SplitGenerator(
                name=datasets.Split.TRAIN,
                gen_kwargs={"filepath": os.path.join(data_dir, "train.csv")},
            ),
            datasets.SplitGenerator(
                name=datasets.Split.VALIDATION,
                gen_kwargs={"filepath": os.path.join(data_dir, "val.csv")},
            ),
            datasets.SplitGenerator(
                name=datasets.Split.TEST,
                gen_kwargs={"filepath": os.path.join(data_dir, "test.csv")},
            ),
        ]

    def _generate_examples(self, filepath):
        # set_trace()
        with open(filepath, encoding="utf-8") as f:
            df = pd.read_csv(filepath, index_col=0)
            for id_, item in df.iterrows():
                yield id_, item.to_dict()