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
160

Other Decks in Technology

See All in Technology
Oracle Base Database Service 技術詳細
Avatar for oracle4engineer oracle4engineer
PRO
15
110k
Jitera Company Deck
Avatar for Jitera Inc. jitera
0
380
副作用のある Lambda でも Lambda Power Tuning は使えるのか / lambda-power-tuning-side-effects
Avatar for koukihosaka koukihosaka
2
150
Amplify Gen2でbackend.tsにCDKを定義する/しない事によるCDKの挙動の違いとユースケース
Avatar for Makky12 smt7174
1
500
AIツールを導入しても生産性はあがらない？ カオナビが直面した 3つの壁と乗り越え方。/ Overcoming 3 Barriers to AI-Driven Productivity at kaonavi
Avatar for 株式会社カオナビ kaonavi
0
230
データエンジニアリングとドメイン駆動設計
Avatar for 増田 亨 masuda220
PRO
14
2.6k
AI x 開発生産性を取り巻く予算戦略と投資対効果
Avatar for Masato Ishigaki / 石垣雅人 i35_267
7
3k
Playwright × AI Agent でE2Eテストはどう変わるか AI駆動テストの可能性と実用検証の結果
Avatar for Taiga Oyu taiga7543
2
840
SRENEXT_2026_Chairs__Talks_in_Tamachi.sre.pdf
Avatar for srenext srenext
1
150
AIコード生成×サプライチェーン攻撃 — PHPが直面する“二重の信頼問題
Avatar for Shinya Saita shinyasaita
0
470
AIが当たり前の組織で エンジニアはどう育つか
Avatar for Motoshi Nishihira nishihira
1
1k
どこまでAIに任せるか 〜確率論と決定論の境界決定〜
Avatar for Shu Kobuchi shukob
0
490

Featured

See All Featured
Money Talks: Using Revenue to Get Sh*t Done
Avatar for Nikki Halliwell nikkihalliwell
0
410
16th Malabo Montpellier Forum Presentation
Avatar for AKADEMIYA2063 akademiya2063
PRO
0
280
AI: The stuff that nobody shows you
Avatar for John Nunemaker jnunemaker
PRO
9
840
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
Avatar for Kevin Liebholz kevinliebholz
37
6.5k
Chasing Engaging Ingredients in Design
Avatar for Sebastian Deterding codingconduct
0
240
Embracing the Ebb and Flow
Avatar for Simon Collison colly
88
5.1k
Bash Introduction
Avatar for André Augusto Costa Santos 62gerente
615
220k
SEO Brein meetup: CTRL+C is not how to scale international SEO
Avatar for Linda Hogenes lindahogenes
1
2.8k
How To Stay Up To Date on Web Technology
Avatar for Chris Coyier chriscoyier
790
250k
Deep Space Network (abreviated)
Avatar for Tony Rice tonyrice
0
230
Code Review Best Practice
Avatar for Trisha Gee trishagee
74
20k
Skip the Path - Find Your Career Trail
Avatar for Mark Kilby mkilby
1
170

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 ?