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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B.3
ソフトウェア開発ツール
531
複数コマンドの直列実行には、各コマンドをセミコロンで区切って指定します。次の例を見てくださ
い。
In [558]: %alias test_alias (cd examples; ls; cd ..)
In [559]: test_alias
macrodata.csv spx.csv tips.csv
IPython
の対話セッション内で定義したエイリアスは、セッション終了とともに消去されます。永続
的に定義したい場合、後述する
IPython
構成機能で定義する必要があります。
B.2.2
ディレクトリブックマークシステム
IPython
にはディレクトリを簡単に行き来できるよう、ディレクトリのブックマーク機能が用意さ
れています。例えば、手元の環境にクローンしたこの本の
GitHub
リポジトリ（
http://github.com/
wesm/pydata-book
）をブックマ
ークに登録してみましょう。
In [6]: %bookmark py4da /home/wesm/code/pydata-book
このように定義しておくと、以降
%cd
マジックコマンドから次のようにしてブックマークを呼び出す
ことができます。
In [7]: cd py4da
(bookmark:py4da) -> /home/wesm/code/pydata-book
/home/wesm/code/pydata-book
時として、カレントディレクトリ内にブックマーク名と同名のディレクトリが存在し、
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