Python - Repeating Code Using Loops - nested for loops, print triangles, hypotenuses, right side, left side

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 9(Repeating Code Using Loops)、Exercise 13、14の解答を求めてみる。

コード

#!/usr/bin/env python3
from unittest import TestCase, main
from test.support import captured_stdout
from typing import List

print('13, 14.')

size = 7


class NestedForLoopsTestCase(TestCase):
    def test13(self):
        s: str = '''T
TT
TTT
TTTT
TTTTT
TTTTTT
TTTTTTT
'''
        with captured_stdout() as stdout:
            for i in range(size):
                for _ in range(i + 1):
                    print('T', end='')
                print()
        self.assertEqual(stdout.getvalue(), s)

    def test14(self):
        s: str = '''      T
     TT
    TTT
   TTTT
  TTTTT
 TTTTTT
TTTTTTT
'''
        with captured_stdout() as stdout:
            for i in range(size):
                for _ in range(size - (i + 1)):
                    print(' ', end='')
                for _ in range(i + 1):
                    print('T', end='')
                print()
        self.assertEqual(stdout.getvalue(), s)


if __name__ == '__main__':
    main()

入出力結果(Zsh、PowerShell、Terminal、Jupyter(IPython))

% ./sample13.py -v
13, 14.
test13 (__main__.NestedForLoopsTestCase) ... ok
test14 (__main__.NestedForLoopsTestCase) ... ok

----------------------------------------------------------------------
Ran 2 tests in 0.000s

OK
%