[jira] [Created] (ARROW-11000) [Python] Enable random access reading for Python file objects (if supported)

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

Joris Van den Bossche created ARROW-11000:
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             Summary: [Python] Enable random access reading for Python file objects (if supported)
                 Key: ARROW-11000
                 URL: https://issues.apache.org/jira/browse/ARROW-11000
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
            Reporter: Joris Van den Bossche


{{arrow::py::PyReadableFile::ReadAt}} is being commented as thread-safe (it puts a lock on the underlying python file) and should thus allow random access in parallel code (for example, reading a subset (eg column) of a parquet file). 

However, based on experimentation, it seems this doesn't work (eg with s3fs filesystem to read a specific parquet column



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