Why is it not possible to upload Dask dataframe to BigQuery due to Python value unrecognized by Arrow?

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This error occurs because Dask uses Arrow to serialize its data when it is being transferred to BigQuery. However, some Python data types may not be recognized by Arrow, causing the serialization to fail. This is especially common with complex data types like nested structures, missing values, or non-standard Python objects.

To resolve this issue, you may need to convert your data to a supported format before uploading it to BigQuery. One way to do this is to convert your Dask dataframe to a Pandas dataframe first, and then upload the Pandas dataframe to BigQuery. Alternatively, you can try converting your data to a format like Parquet or ORC, which are designed to work well with Arrow and can also be uploaded to BigQuery.