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Understanding Metaclass from Type

Avatar for Yusuke Tamura Yusuke Tamura
November 15, 2023
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Understanding Metaclass from Type

みんなのPython勉強会 #99 LT枠

https://startpython.connpass.com/event/300831/

Avatar for Yusuke Tamura

Yusuke Tamura

November 15, 2023
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Transcript

  1. @ 2023 Novasell, Inc. All Rights Reserved. Understanding Metaclass from

    Type 2023/11/15 みんなのPython勉強会(stapy) Lightning Talk NOVASELL.INC , Tamtam 1

  2. @ 2023 Novasell, Inc. All Rights Reserved. Introduction GitHub: @tamtam-fitness,

    X: @TamtamFitness, Zenn: Tamtam I’m Tamtam, japan-born-and-raised 💪 I’m into FastAPI🐍 Currently working at RAKSUL/NOVASELL📃📺

  3. @ 2023 Novasell, Inc. All Rights Reserved. https://techblog.raksul.com/ RAKSUL TechBlog

    社員インタビュー https://recruit.raksul.com/story/archives/engineer/ RAKSUL Engineer Recruitment Book https://raksulinc.notion.site/RAKSUL-Engineer-Recruit ment-Book-a1245092c4434b45b162a9fe277c169f RAKSUL 公式connpass https://raksul.connpass.com/ https://www.youtube.com/channel/UCyihWcvrHmE e-edcqdcJFsQ/ RAKSUL 公式YouTube RAKSUL 公式Ｘ https://twitter.com/raksuldev Find out more about RAKSUL

  4. @ 2023 Novasell, Inc. All Rights Reserved. 4 All objects

    in python have their own types

  5. @ 2023 Novasell, Inc. All Rights Reserved. 5 Class can

    define a new type

  6. @ 2023 Novasell, Inc. All Rights Reserved. 6 The type

    of an instance created is the class

  7. @ 2023 Novasell, Inc. All Rights Reserved. 7 The class

    itself is a type named “type”

  8. @ 2023 Novasell, Inc. All Rights Reserved. 8 Let’s look

    at the process of class definition to understand “type”

  9. @ 2023 Novasell, Inc. All Rights Reserved. 9 “type” constructs

    a class

  10. @ 2023 Novasell, Inc. All Rights Reserved. 10 Step 1:

    read a body

  11. @ 2023 Novasell, Inc. All Rights Reserved. 11 Step 2:

    create a dictionary

  12. @ 2023 Novasell, Inc. All Rights Reserved. 12 Step 3:

    execute these variables

  13. @ 2023 Novasell, Inc. All Rights Reserved. 13 Step 4:

    construct a class

  14. @ 2023 Novasell, Inc. All Rights Reserved. 14 Class that

    creates class is called Metaclass “type” is one of Metaclassess By default, it’s set to type

  15. @ 2023 Novasell, Inc. All Rights Reserved. 15 Reference •

    Advanced Python Mastery - Section7: Meta Programming • Effective Python - 4章 メタクラスと属性

  16. @ 2023 Novasell, Inc. All Rights Reserved. 16 Thank you

    for listening !