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Antoine Pitrou authored and François Saint-Jacques committed 18872a44415
ARROW-3410: [C++][Python] Add streaming CSV reader. Only the serial version is implemented for now. Closes #6764 from pitrou/ARROW-3410-streaming-csv Authored-by: Antoine Pitrou <antoine@python.org> Signed-off-by: François Saint-Jacques <fsaintjacques@gmail.com>