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gh-90533: Implement BytesIO.peek() - #150917

Merged

vstinner merged 54 commits into

python:mainfrom

marcelm:fix-issue-46375

Jun 26, 2026

Commits on Apr 10, 2026
- Implement BytesIO.peek()
  marcelm
  committed
  b833b83
- 📜🤖 Added by blurb_it.
  
  blurb-it[bot]
  authored and
  marcelm
  committed
  50a2cfb
- Document BytesIO.peek()
  marcelm
  committed
  eaa7672
- Implement with the help of read_bytes()
  marcelm
  committed
  00457ae
- Add to What’s New
  marcelm
  committed
  882579d
- versionadded: 3.12 -> 3.13
  marcelm
  committed
  c1eed72
- Remove unused variable
  marcelm
  committed
  afc200c
- Test tell() after peek()
  marcelm
  committed
  79ab9a4
- Update docs, factor out peek_bytes, semantics
  marcelm
  committed
  b493914
- Update Misc/NEWS.d/next/Library/2022-04-10-20-10-59.bpo-46375.8j1ogZ.rst
  
  marcelm
  and
  erlend-aasland
  committed
  2a1c85c
- Update Modules/_io/bytesio.c
  
  marcelm
  and
  erlend-aasland
  committed
  d398717
- Update Modules/_io/bytesio.c
  
  marcelm
  and
  erlend-aasland
  committed
  26d1e81
- Use SemBr
  
  marcelm
  and
  erlend-aasland
  committed
  9a19ff9
- Update Doc/whatsnew/3.13.rst
  
  marcelm
  and
  erlend-aasland
  committed
  9300ade
- Apply suggestions from code review
  
  marcelm
  and
  vstinner
  committed
  d214089
- Use a context manager around memio in test_peek
  marcelm
  committed
  d6691b8
- Add more tests for tell() after peek()
  marcelm
  committed
  3e51adb
- Document why size < 0 can happen
  marcelm
  committed
  3661b65
- Update Modules/_io/bytesio.c
  
  marcelm
  and
  erlend-aasland
  committed
  cd40d77
- Do not update pos if peek_bytes failed
  marcelm
  committed
  04372bd
- Size can be negative after truncate or seek
  marcelm
  committed
  6b9ae8c
- Test with size<0 and size>len(buf)
  marcelm
  committed
  f7406f6
- Test peek() after write()
  marcelm
  committed
  d9528e2
- Document BufferedReader.peek and BytesIO.peek similarly
  marcelm
  committed
  bc8134b
- Comment
  marcelm
  committed
  b6ffca8
- Make it more explicit that size is ignored
  marcelm
  committed
  5fe5645
- Return an empty bytes object for size=0
  marcelm
  committed
  4126a64
- Simplify
  marcelm
  committed
  1ea40c2
- Test peek(3) and peek(5)
  marcelm
  committed
  77e04d6
- Run clinic.py
  marcelm
  committed
  4d2f2dd
Commits on Apr 13, 2026
- Apply suggestions from code review
  
  marcelm
  and
  vstinner
  authored
  c16bebf
- Do not return an empty bytes object for size=0
  marcelm
  committed
  08bd7da
Commits on Apr 15, 2026
- Decorate BytesIO.peek with `@critical_section`
  marcelm
  committed
  6174fca
Commits on Apr 21, 2026
- Test peek returns EOF after seeking to EOF
  marcelm
  committed
  b8b8cf4
- Free-threading test for peek
  marcelm
  committed
  7ac914e
Commits on Apr 27, 2026
- Fix free-threading test
  marcelm
  committed
  abbd8f0
Commits on Apr 29, 2026
- Default to size=0; cap to DEFAULT_BUFFER_SIZE
  marcelm
  committed
  07d9e4d
Commits on Apr 30, 2026
- Revert changes to BufferedReader.peek documentation
  marcelm
  committed
  3d57f45
Commits on May 1, 2026
- Test peek after seek or truncate
  marcelm
  committed
  023ad25
- Merge branch 'main' into fix-issue-46375
  emmatyping
  authored
  203749b
Commits on Jun 4, 2026
- Do not cap at DEFAULT_BUFFER_SIZE
  marcelm
  committed
  32fd791
- Merge branch 'main' into fix-issue-46375
  marcelm
  authored
  7ef7f6d
- Add to What’s New for 3.16
  marcelm
  committed
  e038ae2
- Update Doc/library/io.rst
  
  marcelm
  and
  StanFromIreland
  authored
  3b71960
- Run clinic
  marcelm
  committed
  9c6e8ad
Commits on Jun 8, 2026
- Merge branch 'main' into fix-issue-46375
  emmatyping
  authored
  0be970e
Commits on Jun 11, 2026
- Clarify what peek(0) does
  marcelm
  committed
  e2d3929
- Do not cap at DEFAULT_BUFFER_SIZE even in Python implementation
  marcelm
  committed
  5f07faa
- Test buffer size greater than DEFAULT_BUFFER_SIZE
  marcelm
  committed
  bb5f648
- Test buffer content
  marcelm
  committed
  8a96f88
Commits on Jun 18, 2026
- Return at most DEFAULT_BUFFER_SIZE bytes if size is 0/-1/unspecified
  marcelm
  committed
  5105c55
- Apply suggestions from code review
  vstinner
  authored
  11e65fe
- Apply suggestions from code review
  cmaloney
  authored
  514d102
Commits on Jun 24, 2026
- Merge branch 'main' into fix-issue-46375
  cmaloney
  authored
  bead21a

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