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Title: gh-129011: Update docs for Raw I/O read, readinto, and write by cmaloney · Pull Request #135328 · python/cpython · GitHub

Open Graph Title: gh-129011: Update docs for Raw I/O read, readinto, and write by cmaloney · Pull Request #135328 · python/cpython

X Title: gh-129011: Update docs for Raw I/O read, readinto, and write by cmaloney · Pull Request #135328 · python/cpython

Description: Update RawIOBase and FileIO documentation to match implementation behavior around .read, .readinto, .readall and .write. They may make more than one system call (PEP-475) Add warnings if .write() requires a wrapping retry loop (see: gh-126606) "Raw I/O" .write may not write all bytes buffering=0 example results in a "Raw I/O" More details around non-blocking behavior see also: gh-80050 / GH-130653 (similar work on Buffered I/O read docs) Issue: gh-129011 📚 Documentation preview 📚: https://cpython-previews--135328.org.readthedocs.build/

Open Graph Description: Update RawIOBase and FileIO documentation to match implementation behavior around .read, .readinto, .readall and .write. They may make more than one system call (PEP-475) Add warnings if .write() ...

X Description: Update RawIOBase and FileIO documentation to match implementation behavior around .read, .readinto, .readall and .write. They may make more than one system call (PEP-475) Add warnings if .write() ...

Opengraph URL: https://github.com/python/cpython/pull/135328

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83261c2 gh-129011: Update docs for Raw I/O read, readinto, and write cmaloney Jun 10, 2025 https://github.com/python/cpython/pull/135328/commits/83261c2029e710ead18cbb89f191d738b7defe97
a3b58e4 Merge branch 'main' into rawio_retry_nonblock serhiy-storchaka Jun 2, 2026 https://github.com/python/cpython/pull/135328/commits/a3b58e457cc42827b19db86a347e6528f72dc539
8731795 Apply suggestions from code review cmaloney Jun 4, 2026 https://github.com/python/cpython/pull/135328/commits/8731795a52ffe1b3a7509dfa05643432bff10869
c0b547b Minor grammar tweaks cmaloney Jun 4, 2026 https://github.com/python/cpython/pull/135328/commits/c0b547bf8200680cb7e20876293cfc08aea10f62
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