Polars

if 'data_loader' not in globals():
    from mage_ai.data_preparation.decorators import data_loader
import polars as pl


@data_loader
def load_data(*args, **kwargs):
    df = pl.DataFrame(
        {
            'A': [1, 2, 3, 4, 5] * 10,
            'fruits': ['banana', 'banana', 'apple', 'apple', 'banana'] * 10,
            'ham': ['a', 'b', 'c', 'd', 'e'] * 10,
            'dt': ['2023-03-01', '2023-03-02', '2023-03-03', '2023-03-04', '2023-03-05'] * 10,
            'arr': [[1, 2], [1, 2], [1, 2], [1, 2], [1, 2]] * 10,
            'obj': [dict(a=[1, 2]), dict(a=[3, 4]), dict(a=[5, 6]), dict(a=[7, 8]), dict(a=[9, 10])] * 10,
        }
    )
    df = df.with_columns(
        pl.col('dt').str.to_datetime('%Y-%m-%d')
    )
    return df