Python利用turtle库绘制彩虹代码示例

#-*- coding:utf-8 *-from turtle 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 rgbdef 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((0.8, 0.8, 1.0)) tracer(False) rainbow() #输出文字 tracer(False) goto(100,-100) pendown() color("red") write("武林网",align="center",   font=("Script MT Bold", 80, "bold")) tracer(True) mainloop()if __name__ == "__main__": main()