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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if right_this_minute in odds:
print("
分の値は奇数。
")
else:
print("
分の値は奇数ではない。
")
if
では他（
else
）に何が使えるの？
この例はもう少しで終わりです。最後の
1
文の説明だけが残っています。あまり長い
コードではありませんが、重要です。
if
文から
False
値が返されたときに実行するコー
ドブロックを指定する
else
節です。
この
else
節を詳しく調べてみましょう。
else
節はインデントせずに上の
if
の部分
と揃える必要があります。
「
else
」があったら「
else if
」も
なければいけないんじゃないの？
それとも、
Python
では「
elseif
」と
書くのかな？
初めてコードを書く際の
コロン
の付け忘れは、
Python
初心者に多い
。
どちらも違います。
Python
では
elif
と書きます。
if
文の一環として複数の条件を調べる必要がある場合、
Python
では
else
の他に
elif
も使えます。
elif
文はいく
つでも使えます。（各
elif
文はそれぞれのブロックを持ちま
す）。
次に、
today
という変数に今日を表す文字列があらかじめ
代入されている小さな例を挙げます。
if today == 'Saturday':
print('
パーティ！！
')
elif today == 'Sunday':
print('
リフレッシュ
')
else:
print('
仕事、仕事、仕事
')
1
章 基本
you are here
17
それぞれ異なる
3
つのブロック： ...
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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.