Python中turtle库的使用实例

#coding=utf-8
#绘制蟒蛇
import turtle
turtle.penup()
turtle.pencolor("red")
turtle.forward(-250)
turtle.pendown()
turtle.pensize(10)
turtle.right(45)
for i in range(4):
  turtle.circle(40, 80)
  turtle.circle(-40, 80)
turtle.circle(40, 80 / 2)
turtle.fd(40)
turtle.circle(16, 180)
turtle.fd(40 * 2 / 3)
turtle.done()

#coding=utf-8
# 绘制五角星
import turtle
turtle.pensize(5)
turtle.pencolor("red")
turtle.forward(200)
for i in range(4):
  turtle.right(144)
  turtle.fd(200)
turtle.done()

#绘制时钟
# coding=utf-8
import turtle as tt
from datetime import *

# 当前日期属于一周的第几天
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()]

# 获取当前时间
def Date(t):
  y = t.year
  m = t.month
  d = t.day
  cur_hour = t.hour;
  cur_min = t.minute;
  cur_sec = t.second;
  return "%s-%d-%d %d:%02d:%02d" % (y, m, d, cur_hour, cur_min, cur_sec)

# 移动画笔,距离为distance
def movePen(distance):
  tt.penup()
  tt.pensize(5)
  tt.pencolor("blue")
  tt.fd(distance)
  tt.pendown()

# 绘制表针
def makeHands(name, length):
  # 清空窗口，重置turtule状态为初始状态
  tt.reset()
  movePen(-length * 0.1)
  # 开始记录多边形的顶点
  tt.begin_poly()
  tt.fd(length * 1.1)
  # 停止记录多边形的顶点
  tt.end_poly()
  # 返回记录的多边形
  handForm = tt.get_poly()
  tt.register_shape(name, handForm)

# 初始化
def initial():
  global secHand, minHand, hurHand, printer
  # 重置方向向北(上)，正角度为顺时针
  tt.mode("logo")
  # 建立并初始化表针
  makeHands("secHand", 180)
  makeHands("minHand", 150)
  makeHands("hurHand", 110)
  secHand = tt.Turtle()
  secHand.shape("secHand")
  minHand = tt.Turtle()
  minHand.shape("minHand")
  hurHand = tt.Turtle()
  hurHand.shape("hurHand")

  for hand in secHand, minHand, hurHand:
    hand.shapesize(1, 1, 4)
    hand.speed(0)

  # 输出文字
  printer = tt.Turtle()
  # 隐藏画笔
  printer.hideturtle()
  printer.penup()

# 绘制表盘外框
def drawClock(R):
  # 清空窗口，重置turtule状态为初始状态
  tt.reset()
  # 画笔尺寸
  tt.pensize(5)
  for i in range(60):
    movePen(R)
    if i % 5 == 0:
      tt.fd(20)
      movePen(-R - 20)

      movePen(R + 20)
      if i == 0:
        # 写文本
        tt.write(int(12), align="center", font=("Consolas", 14, "bold"))
      elif i == 30:
        movePen(25)
        tt.write(int(i / 5), align="center", font=("Consolas", 14, "bold"))
        movePen(-25)
      elif (i == 25 or i == 35):
        movePen(20)
        tt.write(int(i / 5), align="center", font=("Consolas", 14, "bold"))
        movePen(-20)
      else:
        tt.write(int(i / 5), align="center", font=("Consolas", 14, "bold"))
      movePen(-R - 20)
    else:
      # 绘制指定半径和颜色的点
      tt.dot(5, "red")
      movePen(-R)
    tt.right(6)

# 表针的动态显示
def handsMove():
  t = datetime.today()
  second = t.second + t.microsecond * 0.000001
  minute = t.minute + second / 60.0
  hour = t.hour + minute / 60.0
  secHand.seth(6 * second)
  minHand.seth(6 * minute)
  hurHand.seth(30 * hour)

  tt.tracer(False)
  printer.fd(65)
  tt.pencolor("green")
  printer.write(Week(t), align="center", font = ("黑体", 14))
  printer.back(130)
  printer.write(Date(t), align="center", font = ("Consolas", 14))
  # 设置当前画笔位置为原点，方向朝东
  printer.home()
  tt.tracer(True)

  # 经过100ms后继续调用handsMove函数
  tt.ontimer(handsMove, 100)

# 调用定义的函数，打开和关闭动画，为更新图纸设置延迟；
tt.tracer(False)
initial()
drawClock(200)
tt.tracer(True)
handsMove()
tt.mainloop()