March 2018
Beginner to intermediate
624 pages
16h 10m
Japanese
Content preview from Head First Python 第2版 ―頭とからだで覚えるPythonの基本
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引数の辞書
関数に関数を渡す。
関数から関数を返す。
任意の数のあらゆる型
の引数を処理。
search4letters(letters='xyz', phrase='galaxy')
def search4letters(phrase:str, letters:str='aeiou') -> set:
引数の辞書を受け取る
関数へ値を渡す際には、引数名とその値を指定します。
こ の テ ク ニ ッ ク は、
4
章 の
search4letters
関 数 で 初 め て 登 場 し ま し た。
search4letters
関数は（思い出したかもしれませんが）
2
つの引数、
phrase
と
letters
を取りました。キーワード引数を使うと、
search4letters
関数に指定す
る引数の順序は重要ではなくなりました。
**
は「キーと値の
辞書に展開する」
という意味。
この関数内では、
kwargs
は他の辞書と
同様に振る舞います。
**
はキーワード
引数を取ることを
関数に伝えます。
辞書内のキーと値の
ペア
を取得して
画面に表示します。
392
10
章
この関数を
呼び出す方法の
1
つです。
キーワード引数
は引数を指定す
る順序には関係
ありません。
リストの場合と同様に、関数が任意の数のキーワード引数を取るようにすることもで
きます。キーワード引数とは、（上の例の
phrase
と
letters
の場合と同様に）キーと
そのキーに代入された値です。
**
を使って任意のキーワード引数を受け取る
Python
では
*
表記だけでなく
**
表記も可能です。 ...
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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.