Python - Using Methods - str class, methods(format, capitalize, find, islower, lower), f-string

Practical Programming
楽天ブックス 紀伊国屋書店

開発環境

• macOS Catalina - Apple (OS)
• Emacs (Text Editor)
• Windows 10 Pro (OS)
• Visual Studio Code (Text Editor)
• Python 3.7 (プログラミング言語)

Practical Programming: An Introduction to Computer Science Using Python 3.6 (Paul Gries(著)、Jennifer Campbell(著)、Jason Montojo(著)、Pragmatic Bookshelf)のChapter 7(Using Methods)、Exercise 9、10、11の解答を求めてみる。

コード

Python 3

#!/usr/bin/env python3
from unittest import TestCase, main


class MyTestCase(TestCase):
    def test9(self):
        season = 'summer'
        self.assertEqual('I love {}!'.format(season), 'I love summer!')
        self.assertEqual(f'I love {season}!', 'I love summer!')

    def test10(self):
        side1 = 3
        side2 = 4
        side3 = 5
        s = 'The sides have lengths 3, 4, and 5.'
        self.assertEqual(
            'The sides have lengths {}, {}, and {}.'.format(
                side1, side2, side3),
            s)
        self.assertEqual(
            f'The sides have lengths {side1}, {side2}, and {side3}.', s)

    def test11a(self):
        self.assertEqual('boolean'.capitalize(), 'Boolean')

    def test11bc(self):
        s = 'CO2 H2O'
        first2 = s.find('2')
        second2 = s.find('2', first2 + 1)
        self.assertEqual(first2, 2)
        self.assertEqual(second2, 5)

    def test11d(self):
        self.assertFalse('Boolean'[0].islower())
        self.assertTrue('boolean'[0].islower())

    def test11e(self):
        self.assertEqual('MoNDaY'.lower().capitalize(), 'Monday')

    def test11f(self):
        self.assertEqual('  Monday'.lstrip(), 'Monday')


if __name__ == '__main__':
    main()

入出力結果(Zsh、cmd.exe(コマンドプロンプト)、Terminal、Jupyter(IPython))

% ./sample9.py -v
test10 (__main__.MyTestCase) ... ok
test11a (__main__.MyTestCase) ... ok
test11bc (__main__.MyTestCase) ... ok
test11d (__main__.MyTestCase) ... ok
test11e (__main__.MyTestCase) ... ok
test11f (__main__.MyTestCase) ... ok
test9 (__main__.MyTestCase) ... ok

----------------------------------------------------------------------
Ran 7 tests in 0.000s

OK
%