Python学习拓展资料

Python turtle：right()、left()、setheading() turtle.right(degree)：顺时针移动degree° turtle.left(degree)：逆时针移动degree° setheading(angle)：设置当前朝向为angle角度 for i in range(3): t.right(i*120) t.forward(200) for i in range(3): t.left(i*120) t.forward(200) for i in range(3): t.setheading(i*120) t.forward(200) 拓展练习： 使用Python画小猪佩奇 from turtle import * def nose(x,y):#鼻子 penup()#提起笔 goto(x,y)#定位 pendown()#落笔，开始画 setheading(-30)#将乌龟的方向设置为to_angle/为数字（0-东、90-北、180-西、270-南） begin_fill()#准备开始填充图形 a=0.4 for i in range(120): if 0<=i<30 or 60<=i<90: a=a+0.08 left(3) #向左转3度 forward(a) #向前走a的步长 else: a=a-0.08 left(3) forward(a) end_fill()#填充完成 penup() setheading(90) forward(25) setheading(0) forward(10) pendown() pencolor(255,155,192)#画笔颜色 setheading(10) begin_fill() circle(5) color(160,82,45)#返回或设置pencolor和fillcolor end_fill() penup() setheading(0) forward(20) pendown() pencolor(255,155,192) setheading(10) begin_fill() circle(5) color(160,82,45) end_fill() def head(x,y):#头 color((255,155,192),"pink") penup() goto(x,y) setheading(0) pendown() begin_fill() setheading(180) circle(300,-30) circle(100,-60) circle(80,-100) circle(150,-20) circle(60,-95) setheading(161) circle(-300,15) penup() goto(-100,100) pendown() setheading(-30) a=0.4 for i in range(60): if 0<=i<30 or 60<=i<90: a=a+0.08 lt(3) #向左转3度 fd(a) #向前走a的步长 else: a=a-0.08 lt(3) fd(a) end_fill() def ears(x,y): #耳朵 color((255,155,192),"pink") penup() #提起笔移动 goto(x,y) pendown() begin_fill() setheading(100) #当前朝100度方向移动 circle(-50,50) #半径50，弧度50 circle(-10,120) circle(-50,54) end_fill() penup() setheading(90) forward(-12) setheading(0) forward(30) pendown() begin_fill() setheading(100) circle(-50,50) circle(-10,120) circle(-50,56) end_fill() def eyes(x,y):#眼睛 color((255,155,192),"white") penup() setheading(90) forward(-20) setheading(0) forward(-95) pendown() begin_fill() circle(15) end_fill() color("black") penup() setheading(90) forward(12) setheading(0) forward(-3) pendown() begin_fill() circle(3) end_fill() color((255,155,192),"white") penup() seth(90) forward(-25) seth(0) forward(40) pendown() begin_fill() circle(15) end_fill() color("black") penup() setheading(90) forward(12) setheading(0) forward(-3) pendown() begin_fill() circle(3) end_fill() def cheek(x,y):#腮 color((255,155,192)) penup() goto(x,y) pendown() setheading(0) begin_fill() circle(30) end_fill() def mouth(x,y): #嘴 color(239,69,19) penup() goto(x,y) pendown() setheading(-80) circle(30,40) circle(40,80) def setting(): #参数设置 pensize(4) hideturtle() #使乌龟无形（隐藏） colormode(255) #将其设置为1.0或255.随后 颜色三元组的r，g，b值必须在0 .. cmode范围内 color((255,155,192),"pink") setup(840,500) speed(10) def main(): setting() #画布、画笔设置 nose(-100,100) #鼻子 head(-69,167) #头 ears(0,160) #耳朵 eyes(0,140) #眼睛 cheek(80,10) #腮 mouth(-20,30) #嘴 done() if __name__ == '__main__': main() ... ...