python生成的彩虹效果，大家可以參考：

使用的python版本：3.7.0 ，以下為源代碼：# rainbow.py

from turtle import *

from random import *

def HSB2RGB(hues):

hues = hues * 3.59 #100轉(zhuǎn)成359范圍

rgb = [0.0,0.0,0.0]

i = int(hues/60) % 6

f = hues/60 - i

if i == 0:

rgb[0] = 1; rgb[1] = f;rgb[2] = 0

elif i == 1:

rgb[0] = 1-f; rgb[1] = 1;rgb[2] = 0

elif i == 2:

rgb[0] = 0; rgb[1] = 1;rgb[2] = f

elif i == 3:

rgb[0] = 0; rgb[1] = 1-f;rgb[2] = 1

elif i == 4:

rgb[0] = f; rgb[1] = 0;rgb[2] = 1

elif i == 5:

rgb[0] = 1; rgb[1] = 0;rgb[2] = 1-f

return rgb

def rainbow():

hues = 0.0

color(1,0,0)

#繪制彩虹

hideturtle()

speed(100)

pensize(3)

penup()

goto(-400,-300)

pendown()

right(110)

for i in range(100):

circle(1000)

right(0.13)

hues = hues + 1

rgb = HSB2RGB(hues)

color(rgb[0], rgb[1], rgb[2])

penup()

def main():

setup(800, 600, 0, 0)

bgcolor((0.5, 0.8, 1.0))

tracer(False)

rainbow()

#輸出文字

goto(100,-100)

pendown()

color("red")

write("Rainbow",align="center",font=("Script MT Bold", 80, "bold"))

tracer(True)

mainloop()

if __name__ == '__main__':

main()

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