Splitting very large csv files into smaller files

2024/10/5 19:19:57

Is Dask proper to read large csv files in parallel and split them into multiple smaller files?

Answer

Yes, dask can read large CSV files. It will split them into chunks

df = dd.read_csv("/path/to/myfile.csv")

Then, when saving, Dask always saves CSV data to multiple files

df.to_csv("/output/path/*.csv")

See the read_csv and to_csv docstrings for much more information about this.

dd.read_csv
dd.DataFrame.to_csv

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