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

CPython's bug in feature that nobody uses

Sponsored · Your Podcast. Everywhere. Effortlessly. Share. Educate. Inspire. Entertain. You do you. We'll handle the rest. →
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
組織における AI-DLC 実践
Avatar for ASKUL Engineer askul
0
140
AIチャット検索改善の3週間
Avatar for KNOWLEDGE WORK / 株式会社ナレッジワーク kworkdev
PRO
2
200
製造現場での生成AIの活用、およびエージェントAIの実装のあり方、AVEVAの取り組み
Avatar for AIxIoTビジネス共創ラボ iotcomjpadmin
0
180
フルAIで個人開発して学んだあれこれ / yuruai vol.1
Avatar for Isao Shimizu isaoshimizu
0
150
從開發到部署全都交給 AI：實作 AI 驅動的自動化流程
Avatar for Bo-Yi Wu appleboy
0
180
攻撃者がいなくてもAIエージェントはインシデントを起こす
Avatar for Nomizo Nomizo nomizone
0
120
【FinOps】データドリブンな意思決定を目指して
Avatar for kaita z63d
2
470
クレデンシャル流出 ― 攻撃 3 時間 vs 復旧 10 時間。この非対称性にどう備えるか
Avatar for kazzpapa3 kazzpapa3
3
610
サイバーエージェントにおけるAI推進戦略と変革への取り組み
Avatar for shotaTsuge shotatsuge
0
600
そこにあるから地図ができる～位置を示す"モノ"を愉しむ～ - Interface 2026年6月号GPS特集オフ会 / interface_202606_GPS_offline
Avatar for sakaik sakaik
1
110
いまさら聞けない「仕様駆動開発入門」 〜AI活用時代の開発プロセスを考える〜
Avatar for ファインディ株式会社（イベント資料アップ用） findy_eventslides
2
230
技術・能力を向上する原理原則 #きのこセッションa #きのこ2026
Avatar for bash0C7 bash0c7
0
140

Featured

See All Featured
Effective software design: The role of men in debugging patriarchy in IT @ Voxxed Days AMS
Avatar for Kenny Baas-Schwegler baasie
0
440
Information Architects: The Missing Link in Design Systems
Avatar for Michelle Chin soysaucechin
0
980
HDC tutorial
Avatar for Michiel Stock michielstock
2
720
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
Avatar for Sam Stephenson sstephenson
162
16k
Intergalactic Javascript Robots from Outer Space
Avatar for Vicent Martí tanoku
273
27k
New Earth Scene 8
Avatar for Sydney Stone popppiees
3
2.4k
Avoiding the “Bad Training, Faster” Trap in the Age of AI
Avatar for Mike Taylor tmiket
0
180
Discover your Explorer Soul
Avatar for Emna emna__ayadi
2
1.1k
The Psychology of Web Performance [Beyond Tellerrand 2023]
Avatar for Tammy Everts tammyeverts
49
3.5k
Documentation Writing (for coders)
Avatar for Carmen Chung carmenintech
77
5.4k
Lightning Talk: Beautiful Slides for Beginners
Avatar for Ines Montani inesmontani
PRO
2
580
JavaScript: Past, Present, and Future - NDC Porto 2020
Avatar for David Neal reverentgeek
52
6k

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 ?