[ARROW-17449] [Python] Better repr for Buffer, MemoryPool and friends

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 10.0.0
• Component/s: Python
• Labels: good-first-issue good-second-issue pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/32714
• Assignee: Miles Granger
• Reporter: Antoine Pitrou
• Created: 17/Aug/22 16:35
• Updated: 11/Jan/23 11:50
• Resolved: 29/Aug/22 10:24

Description

I think we can improve interactive use of PyArrow by making the repr of some basic types (Buffer, MemoryPool...) more informative.
See this session for example:

>>> pool = pa.default_memory_pool()
>>> pool
<pyarrow.lib.MemoryPool at 0x7fea126982a0>
>>> pool.backend_name
'jemalloc'
>>> buf = pa.allocate_buffer(1024, memory_pool=pool)
>>> buf
<pyarrow.lib.Buffer at 0x7fea5e51e7b0>
>>> buf.is_cpu
True
>>> buf.is_mutable
True
>>> buf.size
1024

Issue Links

• links to: GitHub Pull Request #13921