Fix read_csv unit tests. #211
Description
Encounter OSError when the read_csv unit tests was run. See https://github.com/Rust-Data-Science/ulist/actions/runs/4269026322/jobs/7431913627
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Fix
read_csv unit tests. #211Encounter OSError when the read_csv unit tests was run. See https://github.com/Rust-Data-Science/ulist/actions/runs/4269026322/jobs/7431913627