July 2018
Intermediate to advanced
596 pages
13h 35m
Japanese
Content preview from Pythonによるデータ分析入門 第2版 ―NumPy、pandasを使ったデータ処理
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28
2
章
Python
の基礎、
IPython
と
Jupyter Notebook
コマンド 説明
Ctrl-K
カーソル位置から行末までのテキストを消去（消去した文字列は
Ctrl-Y
で貼り付け可
能）。
Ctrl-U
現在入力中の行内のすべての文字列を消去（消去した文字列は
Ctrl-Y
で貼り付け可能）。
Ctrl-F
カーソルを一文字分進める。
Ctrl-B
カーソルを一文字分戻す。
Ctrl-L
画面全体消去。
なお、
Jupyter Notebook
環境にも移動や編集のためのキーボードショートカットが独自に用意され
ています。
IPython
のショートカットと比べて
Jupyter Notebook
のショートカットは急速に発展し続け
ているため、最新の情報については
Jupyter Notebook
メニューからヘルプを参照するようにしてくだ
さい。
2.2.8
マジックコマンド
Python
が標準で提供するものとは別に、
IPython
にはマジックコマンドと呼ばれる特別なコマンドが
提供されています。マジックコマンドは、
デバッグなどさまざまなプログラミングで共通する作業を容
易にするため、また
IPython
自体への制御方法を提供するために準備されています。マジックコマンド
はコマンドの先頭にパーセント記号（
%
）が付きます。ここで、マジックコマンドの例として
%timeit
を
見てみましょう。
%timeit
は
Python
命令の実行時間を計測することができます。動作の詳細は後述す
ることにして、ここではまず行列の掛け算に掛かる時間
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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.