Python Start Turtle Library application Example __python

1, the use of Turtle Library functions to draw different geometries, and do fill processing:

# turtletest.py Import Turtle def main (): Turtle.speed (2) turtle.pensize (3) turtle.penup () turtle.go to ( -200,-50) Turtle.pendown () #表示开始做图形填充 Turtle.begin_fill () turtle.color (' Red ') turtle.circle (40,step s= 3) #填充结束 Turtle.end_fill () turtle.penup () Turtle.goto ( -100,-50) turtle.pendown () Turtle.begin_ Fill () Turtle.color ("Blue") turtle.circle (steps=4) Turtle.end_fill () Turtle.penup () ( 0,-50) Turtle.pendown () Turtle.begin_fill () Turtle.color ("green") turtle.circle (steps=5) turtle.en D_fill () Turtle.penup () Turtle.goto (100,-50) Turtle.pendown () Turtle.begin_fill () Turtle.color ("Yell ow ") turtle.circle (steps=6) Turtle.end_fill () Turtle.penup () Turtle.goto (200,-50) Turtle.pendown () Turtle.begin_fill () Turtle.color ("purple") turtle.circle #未设置步数则认为是绘制圆形 Turtle.end_fill () Turt Le.color ("green") tuRtle.penup () Turtle.goto ( -100,50) Turtle.pendown () turtle.write ("Cool Colorful Shapes"), #添加文字 font = ("Times", "bold")

 
 #设置文字格式 turtle.hideturtle () #隐藏画笔形状 turtle.done () if __name__ = = ' __main__ ': Main ()

Run Result:

2, using Turtle to draw graphical interactive interface, to chat software as an example;

# uiturtle.py from tkinter import * Import time Def main (): Def sendmsg (): #发送消息 strMsg = ' I: ' +time.strftime ( '%y-%m-%d%h:%m:%s ', time.localtime () + ' \ n ' txtmsglist.insert (end,strmsg, ' Greencolor ') Txtmsglist.insert (EN

    D,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.titl

    E (' Chat with * * ") # T.  #创建frame容器 (actually dividing the window into different functional areas) FRMLT = frame (width = 500,height = 320,BG = ' White ') FRMLC = frame (width = 500,height
    = 150,BG = ' White ') frmlb = frame (width = 500,height =) FRMRT = FRAME (width = 200,height =) #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 txt MSG = Text (FRMLC) txtmsg.bind (' <KeyPress-Up> ', sendmsgevent) btnsend = Button (frmlb,text = ' send ', width = 8,Command = sendmsg) Btncancel = Button (Frmlb,text = ' Cancel ', 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 frm Lt.grid_propagate (0) frmlc.grid_propagate (0) frmlb.grid_propagate (0) frmrt.grid_propagate (0) "pay special attention to the grid () function:
 This geometry manager organizes the parts in the parent part's table structure.
    Syntax: Widget.grid (grid_options) below is a list of possible options: column: Drop widget, defaults to 0 (leftmost column).
    ColumnSpan: The number of columns used by the part, defaults to 1.
    IPADX, Ipady: How many parts of the pixel, horizontal and vertical direction, part of the boundary.
    PADX, Pady: How many parts of the pixel, horizontal and vertical direction, V of the outer boundary.
    Row: The row places the widget; The default first row is still empty.
    RowSpan: How many rows of parts occupy; the default is 1. Sticky: What to do if the cell is larger than the widget. By default, the widget is in its cell center with sticky = '.
The sticky may be a string connected to 0 or more n,e,s,w, northeast, northwest, southeast, southwest, Compass direction indicating the parts adhere to the sides and corners of the cell.
   ''' Btnsend.grid (row = 3,column = 0) btncancel.grid (row = 3,column = 1) lblimage.grid () Txtmsglist.grid () txt
 Msg.grid () #主事件循环 t.mainloop () if __name__ = = ' __main__ ': Main ()

Execution results: