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Wes McKinney
4a65fea011f
Wes McKinney authored e1d9c7fc7b3
ARROW-1550: [Python] Explicitly close owned file handles in ParquetWriter.close to avoid Windows flakiness

I can reproduce this failure locally, but I'm unsure why this just now started happening. The 0.7.0 release build passed (https://ci.appveyor.com/project/ApacheSoftwareFoundation/arrow/build/1.0.3357/job/477b1iicmwuy51l8) and there haven't been related code changes since then. Either way it's better to close the sink explicitly

Author: Wes McKinney <wes.mckinney@twosigma.com>

Closes #1114 from wesm/ARROW-1550 and squashes the following commits:

863827c4 [Wes McKinney] Check status
7248c793 [Wes McKinney] Explicitly close owned file handles in ParquetWriter.close to avoid flakiness on Windows