Upgrade to Pro — share decks privately, control downloads, hide ads and more …

CPython's bug in feature that nobody uses

Avatar for dv dv
June 06, 2015
Technology
130
0

CPython's bug in feature that nobody uses

Avatar for dv

dv

June 06, 2015

More Decks by dv

See All by dv
Python module in Rust
Avatar for dv wdv4758h
0
200
First try for CAS, SymPy with codegen
Avatar for dv wdv4758h
0
720
Android Memory Leak Profiling - VMFive
Avatar for dv wdv4758h
0
320
Vim 手指健康操
Avatar for dv wdv4758h
3
940
FreeBSD ports system
Avatar for dv wdv4758h
0
150

Other Decks in Technology

See All in Technology
ポケモンの型をTypeScriptの型システムで表現してみた
Avatar for subroh_0508 subroh0508
0
310
ルールやカスタム機能、どう使う？理想の出力を引き出すために今知りたいIBM Bob 5つの機能
Avatar for mu (Mizuho Uehara) muehara
1
330
noUncheckedIndexedAccess、3時間、1万円。 / noUncheckedIndexedAccess, 3 Hours, 10,000 JPY.
Avatar for 株式会社カオナビ kaonavi
1
290
Oracle Cloud Infrastructure IaaS 新機能アップデート 2026/3 - 2026/5
Avatar for oracle4engineer oracle4engineer
PRO
1
190
マーケットプレイス版Oracle WebCenter Content For OCI
Avatar for oracle4engineer oracle4engineer
PRO
5
1.8k
Sony_KMP_Journey_KotlinConf2026
Avatar for ソニー株式会社 sony
2
210
「嘘をつくテスト」の失敗例から学ぶ 良いテストコード #frontend_phpcon_do
Avatar for asumikam asumikam
0
230
速さだけじゃない！ VoidZero ツールが移行先に選ばれる理由
Avatar for mizdra mizdra
PRO
6
750
チームで実践する AI-DLC 思考の軌跡を残すチェックポイント設計
Avatar for Belong inc. belongadmin
0
2.5k
個人最適 から 全体最適 へ　AI情報共有会・AIギルド・AI-DLC で進める カンリーの組織展開
Avatar for ふくだ（fukuda ryu） rfdnxbro
0
1.5k
形式手法特論：公平性制約の位相的特徴づけ #kernelvm / Kernel VM Study Kansai 12th
Avatar for y_taka_23 ytaka23
1
740
Cloud Run のアップデート 触ってみる＆紹介
Avatar for Gre212 gre212
0
310

Featured

See All Featured
Fight the Zombie Pattern Library - RWD Summit 2016
Avatar for Marcelo Somers marcelosomers
234
17k
Pawsitive SEO: Lessons from My Dog (and Many Mistakes) on Thriving as a Consultant in the Age of AI
Avatar for David Carrasco davidcarrasco
0
160
Become a Pro
Avatar for Speaker Deck speakerdeck
PRO
31
6k
More Than Pixels: Becoming A User Experience Designer
Avatar for Michelle Schulp Hunt marktimemedia
3
430
Navigating Algorithm Shifts & AI Overviews - #SMXNext
Avatar for Aleyda Solis aleyda
1
1.3k
Heart Work Chapter 1 - Part 1
Avatar for Lake Fama lfama
PRO
7
36k
Chasing Engaging Ingredients in Design
Avatar for Sebastian Deterding codingconduct
0
210
The State of eCommerce SEO: How to Win in Today's Products SERPs - #SEOweek
Avatar for Aleyda Solis aleyda
2
11k
End of SEO as We Know It (SMX Advanced Version)
Avatar for Michael King ipullrank
3
4.2k
KATA
Avatar for Megan Lloyd mclloyd
PRO
35
15k
What the history of the web can teach us about the future of AI
Avatar for Ines Montani inesmontani
PRO
1
600
Bash Introduction
Avatar for André Augusto Costa Santos 62gerente
615
210k

Transcript

  1. CPython's bug in feature that nobody uses Chiu-Hsiang Hsu [email protected]

  2. nickname : dv (currently) undergraduate student

  3. CPython the de-facto reference Python implementation

  4. tarfile module to r/w tar archives include those using gzip,

    bz2, lzma compression

  5. tarfile module add CLI since Python 3.4

  6. It’s similar to “tar” command in Unix-like system

  7. Comparison tarfile module python -m tarfile -c files.tar files/ python

    -m tarfile -c files.tar.gz files/ python -m tarfile -c files.tar.bz2 files/ python -m tarfile -c files.tar.xz files/ tar command tar cf files.tar files/ tar zcf files.tar.gz files/ tar jcf files.tar.bz2 files/ tar Jcf files.tar.xz files/

  8. tarfile module can choose compression algorithm automatically, but tar command

    can’t

  9. seems a little bit smarter ?

  10. But

  11. It’s broken :(

  12. It won’t use any compression algorithm !!! ? ? ?

  13. None

  14. tarfile.py with bug without bug

  15. tarfile.py with bug without bug

  16. I hate (love) those dot

  17. fix in CPython 3.4.4 and 3.5

  18. fix in CPython 3.4.4 and 3.5 but who cares this

    feature XD ?