November 2018
Intermediate to advanced
272 pages
6h 51m
Japanese
book
エレガントなSciPy ―Pythonによる科学技術計算
by Juan Nunez-Iglesias, Stéfan van der Walt, Harriet Dashnow, 山崎 邦子, 山崎 康宏
Content preview from エレガントなSciPy ―Pythonによる科学技術計算
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202
8 章 Toolz を使って小さなノートパソコンでビッグデータを処理する方法
add_partial(5)
7
上のコードで行ったことをまとめると、
add
はカリー化された関数になったので、引数のうちの
1
つを受け取って、その引数を「覚えている」別の関数
add_partial
を返すことができます。
実は、
Toolz
のすべての関数は、カリー化されたバージョンが
toolz.curried
ネームスペース中
に用意されているのです。さらに、
Toolz
には、
Python
の便利な高階関数である
map
、
filter
、
reduce
などのカリー化版もあります。ここでは、
curried
ネームスペースを
c
としてインポートし
て、コードが雑然とするのを防ぎます。したがって、例えば、カリー化された
map
関数は、
c.map
と表されます。ただし、カリー化された関数（例えば
c.map
）は、カリー化された関数を作成する
ために使われる
@curry
デコレータとは異なることに注意してください。
from toolz import curried as c
c.map
<class 'map'>
念のため言っておくと、
map
は組み込み関数です。ドキュメント（
https://docs.python.jp/3.4/
library/functions.html#map
）から以下を抜粋しておきます。
map(function, iterable, ...)
function
を、結果を返しながら
iterable
の全ての要素に適用するイテレータを返します。 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.