Python起步之turtle库应用实例

1、运用turtle库函数实现绘制不同几何图形，并做填充处理：

# TurtleTest.py
import turtle

def main():
turtle.speed(2)

turtle.pensize(3)
turtle.penup()
turtle.goto(-200,-50)
turtle.pendown()
#表示开始做图形填充
turtle.begin_fill()
turtle.color('red')
turtle.circle(40,steps= 3)
#填充结束
turtle.end_fill()

turtle.penup()
turtle.goto(-100,-50)
turtle.pendown()
turtle.begin_fill()
turtle.color("blue")
turtle.circle(40, steps=4)
turtle.end_fill()

turtle.penup()
turtle.goto(0,-50)
turtle.pendown()
turtle.begin_fill()
turtle.color("green")
turtle.circle(40, steps=5)
turtle.end_fill()

turtle.penup()
turtle.goto(100,-50)
turtle.pendown()
turtle.begin_fill()
turtle.color("yellow")
turtle.circle(40, steps=6)
turtle.end_fill()

turtle.penup()
turtle.goto(200,-50)
turtle.pendown()
turtle.begin_fill()
turtle.color("purple")
turtle.circle(40)#未设置步数则认为是绘制圆形
turtle.end_fill()

turtle.color("green")
turtle.penup()
turtle.goto(-100,50)
turtle.pendown()
turtle.write(("Cool Colorful shapes"),#添加文字
font = ("Times", 18, "bold"))#设置文字格式
turtle.hideturtle()#隐藏画笔形状

turtle.done()

if __name__ == '__main__':
main()

运行结果：



2、利用turtle绘制图形交互界面，以聊天软件为例;

# UITurtle.py

from tkinter import *
import time

def main():
def sendMsg():#发送消息
strMsg = '我：'+time.strftime('%Y-%m-%d %H:%M:%S',time.localtime())+'\n'
txtMsgList.insert(END,strMsg,'greencolor')
txtMsgList.insert(END,txtMsg.get('0.0',END))
txtMsg.delete('0.0',END)

def cancelMsg():#取消消息
txtMsg.delete('0.0',END)

def sendMsgEvent(event):#发送消息事件
if event.keysym == 'Up':
sendMsg()

#创建窗口
t = Tk()
t.title('与***聊天中')
# t.

#创建frame容器（实际上是将窗口划分成不同的功能区）
frmLT = Frame(width = 500,height = 320,bg = 'white')
frmLC = Frame(width = 500,height = 150,bg = 'white')
frmLB = Frame(width = 500,height = 30)
frmRT = Frame(width = 200,height = 500)

#创建控件
txtMsgList = Text(frmLT)#在父窗口frmLT中创建一个文本对象
txtMsgList.tag_config('greencolor',foreground = '#008C00') #创建tag
txtMsg = Text(frmLC)
txtMsg.bind('<KeyPress-Up>',sendMsgEvent)
btnSend = Button(frmLB,text = '发 送',width = 8,command = sendMsg)
btnCancel = Button(frmLB,text = '取 消',width = 8,command = cancelMsg)
imgInfo = PhotoImage(file = 'python.gif')
lblImage = Label(frmRT,image = imgInfo)
lblImage.image = imgInfo

#窗口布局
frmLT.grid(row = 0,column = 0,columnspan = 2,padx =1,pady = 3)
frmLC.grid(row = 1,column = 0,columnspan = 2,padx =1,pady = 3)
frmLB.grid(row = 2,column = 0,columnspan = 2)
frmRT.grid(row = 0,column = 2,rowspan = 3,padx =2,pady = 3)

#固定大小
frmLT.grid_propagate(0)
frmLC.grid_propagate(0)
frmLB.grid_propagate(0)
frmRT.grid_propagate(0)
'''
特别注意grid()函数:这个的几何管理器组织在父部件的表状结构中的部件。
语法:
widget.grid( grid_options )
下面是可能的选项列表:
column : 列放部件，默认为0（最左边的列）.
columnspan: 部件占用多少列，默认为1.
ipadx, ipady : 多少部件的像素，水平和垂直方向，部件的边界内.
padx, pady : 多少部件的像素，水平和垂直方向，V的外边界.
row: 该行放小部件;默认的第一行仍然是空的.
rowspan : 多少行的部件占用;默认为1.
sticky : 做什么，如果单元格是比小部件大。默认情况下，用粘=''，widget是在其细胞中心。粘可能是字符串连接的零个或多个N，E，S，W，东北，西北，东南，西南，罗盘方向指示部件坚持单元格的两侧和边角.
'''
btnSend.grid(row = 3,column = 0)
btnCancel.grid(row = 3,column = 1)
lblImage.grid()
txtMsgList.grid()
txtMsg.grid()

#主事件循环
t.mainloop()

if __name__ == '__main__':
main()
执行结果：