Aaron Opfer created ARROW-6667:
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Summary: [Python] Avoid Reference Cycles in pyarrow.parquet
Key: ARROW-6667
URL: https://issues.apache.org/jira/browse/ARROW-6667
Project: Apache Arrow
Issue Type: Improvement
Reporter: Aaron Opfer
Attachments: cycle1_build_nested_path.PNG, cycle2_open_dataset.PNG
Reference cycles appear in two places inside pyarrow.parquet which causes these
objects to have much longer lifetimes than necessary:
{{_build_nested_path}} has a reference cycle because the closured function
refers to the parent cell which also refers to the closured function again
(objgraph shown in attachment)
{{open_dataset_file}} is partialed with self inside the {{ParquetFile}} class
(objgraph shown in attachment).
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