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
0
96

CPython's bug in feature that nobody uses

Avatar for dv

dv

June 06, 2015
Tweet

More Decks by dv

See All by dv
Python module in Rust
Avatar for dv wdv4758h
0
150
First try for CAS, SymPy with codegen
Avatar for dv wdv4758h
0
660
Android Memory Leak Profiling - VMFive
Avatar for dv wdv4758h
0
250
Vim 手指健康操
Avatar for dv wdv4758h
3
840
FreeBSD ports system
Avatar for dv wdv4758h
0
130

Other Decks in Technology

See All in Technology
kotlin-lsp を Emacs で使えるようにしてみた / use kotlin-lsp in Emacs
Avatar for nabeo nabeo
0
140
Create a Rails8 responsive app with Gemini and RubyLLM
Avatar for Riccardo Carlesso palladius
0
110
マルチテナント+マルチプロダクト SaaS への AI Agent の組み込み方
Avatar for KNOWLEDGE WORK / 株式会社ナレッジワーク kworkdev
PRO
2
300
AWS全冠したので振りかえってみる
Avatar for tajimon tajimon
0
130
やさしい認証認可
Avatar for みのるん minorun365
PRO
29
12k
今からでも間に合う！ 生成AI「RAG」再入門 / Re-introduction to RAG in Generative AI
Avatar for Hideaki Aoyagi hideakiaoyagi
1
160
自分を理解するAI時代の準備 〜マイプロフィールMCPの実装〜
Avatar for edo edo_m18
0
100
Devin(Deep) Wiki/Searchの活用で変わる開発の世界観/devin-wiki-search-impact
Avatar for tomoki10 tomoki10
0
290
Kotlinで学ぶ 代数的データ型
Avatar for Kanon ysknsid25
5
1.1k
Introduction to Sansan for Engineers / エンジニア向け会社紹介
Avatar for Sansan, Inc. sansan33
PRO
5
38k
RubyOnRailsOnDevin+α / DevinMeetupJapan#2
Avatar for ginkouno ginkouno
0
170
Introduction to Bill One Development Engineer
Avatar for Sansan, Inc. sansan33
PRO
0
250

Featured

See All Featured
Intergalactic Javascript Robots from Outer Space
Avatar for Vicent Martí tanoku
271
27k
Building Applications with DynamoDB
Avatar for Matt Wood mza
95
6.4k
Measuring & Analyzing Core Web Vitals
Avatar for Philip Tellis bluesmoon
7
480
Optimising Largest Contentful Paint
Avatar for Harry Roberts csswizardry
37
3.3k
For a Future-Friendly Web
Avatar for Brad Frost brad_frost
179
9.8k
Art, The Web, and Tiny UX
Avatar for Lynn Fisher lynnandtonic
299
21k
Building a Modern Day 
E-commerce SEO Strategy
Avatar for Aleyda Solis aleyda
41
7.3k
Side Projects
Avatar for Sacha Greif sachag
454
42k
Balancing Empowerment & Direction
Avatar for Lara Hogan lara
1
280
Typedesign – Prime Four
Avatar for Hannes Fritz hannesfritz
42
2.7k
Building a Scalable Design System with Sketch
Avatar for Laura Van Doore lauravandoore
462
33k
The Web Performance Landscape in 2024 [PerfNow 2024]
Avatar for Tammy Everts tammyeverts
8
650

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 ?