Python - Loops Are Fun (You Can Say That Again)(A SPIRAL OF FAMILY SPIRALS, position, heading)

Teach Your Kids to Code

開発環境

• macOS High Sierra - Apple
• Emacs (Text Editor)
• Python 3.6 (プログラミング言語)

Teach Your Kids to Code: A Parent-Friendly Guide to Python Programming (Bryson Payne(著)、No Starch Press)のChapter 4.(Loops Are Fun (You Can Say That Again))、PROGRAMMING CHALLENGES、#2: A SPIRAL OF FAMILY SPIRALSを取り組んでみる。

#2: A SPIRAL OF FAMILY SPIRALS

コード(Emacs)

Python 3

#!/usr/bin/env python3
import turtle

colors = ['red', 'yellow', 'blue', 'orange',
          'green', 'purple', 'brown', 'white', 'gray', 'pink']

t = turtle.Pen()
t.speed(0)
turtle.bgcolor('black')
family = []
name = turtle.textinput(
    'My family', 'Enter a name, or just hit [Enter] to end:')

while name != '':
    family.append(name)
    name = turtle.textinput(
        'My family', 'Enter a name, or just hit [Enter] to end:')

for m in range(100):
    t.forward(m * 4)
    position = t.position()
    heading = t.heading()
    t.width(m / 10)
    for x in range(len(family)):
        t.pencolor(colors[x % len(family)])
        t.pendown()
        t.write(family[x % len(family)], font=(
            'Arial', int((m + 4) / 4), 'bold'))
        t.penup()
        t.forward(m)
    t.setx(position[0])
    t.sety(position[1])
    t.setheading(heading)
    t.left(360 / len(family) + 2)

print('done')
input()

入出力結果(Terminal, Jupyter(IPython))

$ ./sample2.py
done
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$ ./sample2.py
done
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$ ./sample2.py
done
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$ ./sample2.py
done
q
$ ./sample2.py
done
q
$ ./sample2.py
done
q
$ ./sample2.py
done
q
$ ./sample2.py
done
q
$