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David LiBenjamin Kietzman
651aafc0292
David Li authored and Benjamin Kietzman committed 06cb1a60a52
ARROW-10372: [Dataset][C++][Python][R] Support reading compressed CSV

This adds support for reading compressed CSV datasets in C++/Python/R. Files' compression will be guessed from their extensions (`f.csv.gz` -> gzip compression).

Closes #9685 from lidavidm/arrow-10372

Lead-authored-by: David Li <li.davidm96@gmail.com>
Co-authored-by: Neal Richardson <neal.p.richardson@gmail.com>
Signed-off-by: Benjamin Kietzman <bengilgit@gmail.com>