使用python画出彩虹效果

python生成的彩虹效果，大家可以参考：

使用的python版本：3.7.0 ，以下为源代码：

# rainbow.py

from turtle import *
from random import *

def HSB2RGB(hues):
	hues = hues * 3.59 #100转成359范围
	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)
	#绘制彩虹
	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()
	#输出文字
	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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