Daniel Kirsch - Functional Programming in Python скачать в хорошем качестве

Daniel Kirsch - Functional Programming in Python

PyData Berlin 2016 There should be one-- and preferably only one --obvious way to do it. And that is functional - at least in my opinion. I'm working with Python for a living since two years after coming from a background in Ruby, Haskell, Clojure, and some more languages. Since then I have tried to marry ideomatic Python to the functional style I learned to love. It's time to share my experience. I will talk about higher order functions partial function application and currying function composition functional collection transformations (and why they are relevant for PySpark) (fake) lazy evaluation and how it all relates to Python (and what's missing). Slides: https://github.com/kirel/functional-p... 00:00 Welcome Remarks 00:19 About Me (Daniel Kirsch) 01:06 About This Talk 01:20 Disclaimer - PEP 20 03:19 Vocabulary of Concepts 03:47 Purity (Functions Without Side-Effects) 04:23 First Class Functions 04:54 Higher-Order Functions 05:32 Decorators as Higher-Order Functions 05:49 Partial Function Application 07:15 Currying 09:05 Interlude: Closures 09:55 Currying Example from the Standard Library 10:53 Functional Collection Transformations (Map, Filter, & Reduce) 11:04 Map 11:39 Filter 12:12 Reduce 14:01 Function Composition 15:16 Example: A Bad CSV Parser (1/3) 15:38 Example: Imperative Python (2/3) 16:18 Example: Functional Python (3/3) 20:35 Example: PySpark 21:26 Example: K-Means 23:15 Main Takeaways 23:53 What is Missing in Python 25:00 Functional Libraries 25:38 Nicer Lambda Syntax 26:05 Other Interesting Stuff 26:16 Other Talks (Where I Have Stolen Material) 27:13 More FP? 27:38 Thank You 28:10 Audience Questions: Do you have a workaround for Immutability? 29:58 Audience Questions: Composition in Python is ugly, any workaround? 31:43 Audience Comment: Cannot assume the Pure Function example won't have a side-effect. 32:43 Audience Question: Underscore construct in PySpark 34:39 Audience Question: Any Python packages that try to mimic Scala like functional programming? 35:34 Audience Question: List Comprehensions are faster than map(), what is your take? 38:17 Last Question: Have you looked at Hy dialect? S/o to https://github.com/hfzvc for the video timestamps! Want to help add timestamps to our YouTube videos to help with discoverability? Find out more here: https://github.com/numfocus/YouTubeVi...