August 2022
Intermediate to advanced
200 pages
5h 16m
Japanese
Content preview from Python1年生 第2版 体験してわかる！会話でまなべる！プログラミングのしくみ
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Chapter
4
132
プログラム全体の構造
画像表示アプリには2つの関数があり、ボタンをクリックすることで順番に呼び出され
て画像を表示します。
ボタン openFile 関数
ファイルダイアログを表示 画像を表示
ファイルを選択ボタンをクリック
dispPhoto 関数
モジュールのインポート
今作ったプログラムが、どんなしくみでできているのか見てみよう。
まずは
1
〜
4
行目。このアプリでは
4
つのモジュールを使うので、
import
は
4
つあるよ。
19
LESSON
先ほど入力した画像表示アプリの中身を詳しく見てみましょう。
画像表示アプリの中で
何をし て いる の？
プログラム全体
LESSON
19
133
画像表示アプリの中で何をしているの？
import tkinter as tk
import tkinter.filedialog as fd
import PIL.Image
import PIL.ImageTk
画面を作る部分
19
〜
26
行目は、このアプリの画面を作っている部分。ウィンドウを
用意して、ファイルを開くボタン（
btn
）を 作って配置している。ボタ
ンがクリックされたらファイルダイアログを開く関数（
openFile
）を
実行するよ。
さらに、画像を表示するラベル（
imageLabel
）も 作っている。この
GUI
ツールキットでは、ラベルに画像を表示できるんだ。そして、ボタ
ンとラベルをウィンドウに配置して、
mainloop
を実行しているんだ。
「
command=openFile
」のところだね。
root = tk.Tk ...
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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.