本文在原文的基礎上作了一些改動與刪減 [轉]https://www.cnblogs.com/chen0307/articles/9645138.htmlhtml
在英語中turtle的意思:海龜;(任何種類的)龜;陸龜;水龜;鱉
Turtle庫是Python語言中一個很流行的繪製圖像的函數庫,所以咱們能夠想象一個小烏龜,在一個橫軸爲x、縱軸爲y的座標系原點,(0,0)位置開始,它根據一組函數指令的控制,在這個平面座標系中移動,從而在它爬行的路徑上繪製了圖形。下面是turtle庫的指令集:
利用turtle庫畫出一個五角星python
# coding=utf-8 import turtle import time turtle.pensize(5) turtle.pencolor("yellow") turtle.fillcolor("red") turtle.begin_fill() for _ in range(5): turtle.forward(200) turtle.right(144) turtle.end_fill() time.sleep(2) turtle.penup() turtle.goto(-150, -120) turtle.color("violet") turtle.write("Done", font=('Arial', 40, 'normal')) turtle.mainloop()
效果:
畫出一個時鐘的程序:ide
# coding=utf-8 import turtle from datetime import * def Skip(step): turtle.penup() turtle.forward(step) turtle.pendown() def mkHand(name, length): # 註冊Turtle形狀,創建錶針Turtle turtle.reset() Skip(-length * 0.1) # 開始記錄多邊形的頂點。當前的烏龜位置是多邊形的第一個頂點。 turtle.begin_poly() turtle.forward(length * 1.1) # 中止記錄多邊形的頂點。當前的烏龜位置是多邊形的最後一個頂點。將與第一個頂點相連。 turtle.end_poly() # 返回最後記錄的多邊形。 handForm = turtle.get_poly() turtle.register_shape(name, handForm) def Init(): global secHand, minHand, hurHand, printer # 重置Turtle指向北 turtle.mode("logo") # 創建三個錶針Turtle並初始化 mkHand("secHand", 135) mkHand("minHand", 125) mkHand("hurHand", 90) secHand = turtle.Turtle() secHand.shape("secHand") minHand = turtle.Turtle() minHand.shape("minHand") hurHand = turtle.Turtle() hurHand.shape("hurHand") for hand in secHand, minHand, hurHand: hand.shapesize(1, 1, 3) hand.speed(0) # 創建輸出文字Turtle printer = turtle.Turtle() # 隱藏畫筆的turtle形狀 printer.hideturtle() printer.penup() def SetupClock(radius): # 創建表的外框 turtle.reset() turtle.pensize(7) for i in range(60): Skip(radius) if i % 5 == 0: turtle.forward(20) Skip(-radius - 20) Skip(radius + 20) if i == 0: turtle.write(int(12), align="center", font=("Courier", 14, "bold")) elif i == 30: Skip(25) turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold")) Skip(-25) elif (i == 25 or i == 35): Skip(20) turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold")) Skip(-20) else: turtle.write(int(i / 5), align="center", font=("Courier", 14, "bold")) Skip(-radius - 20) else: turtle.dot(5) Skip(-radius) turtle.right(6) def Week(t): week = ["星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日"] return week[t.weekday()] def Date(t): y = t.year m = t.month d = t.day return "%s %d%d" % (y, m, d) def Tick(): # 繪製錶針的動態顯示 t = datetime.today() second = t.second + t.microsecond * 0.000001 minute = t.minute + second / 60.0 hour = t.hour + minute / 60.0 secHand.setheading(6 * second) minHand.setheading(6 * minute) hurHand.setheading(30 * hour) turtle.tracer(False) printer.forward(65) printer.write(Week(t), align="center", font=("Courier", 14, "bold")) printer.back(130) printer.write(Date(t), align="center", font=("Courier", 14, "bold")) printer.home() turtle.tracer(True) # 100ms後繼續調用tick turtle.ontimer(Tick, 100) def main(): # 打開/關閉龜動畫,併爲更新圖紙設置延遲。 turtle.tracer(False) Init() SetupClock(160) turtle.tracer(True) Tick() turtle.mainloop() if __name__ == "__main__": main() turtle.mainloop()
效果如圖:函數