python交互式图形编程实例（一）

#!/usr/bin/env python3# -*- coding: utf-8 -*-#温度转换from graphics import * win = GraphWin("摄氏温度转换器", 400, 300)win.setCoords(0.0, 0.0, 3.0, 4.0)# 绘制接口Text(Point(1,3), " 摄氏温度:").draw(win)Text(Point(1,1), " 华氏温度:").draw(win)input = Entry(Point(2,3), 5)input.setText("0.0")input.draw(win)output = Text(Point(2,1),"")output.draw(win)button = Text(Point(1.5,2.0),"转换")button.draw(win)Rectangle(Point(1,1.5), Point(2,2.5)).draw(win)# 等待鼠标点击win.getMouse()# 转换输入celsius = eval(input.getText())fahrenheit = 9.0/5.0 * celsius + 32.0# 显示输出，改变按钮output.setText(fahrenheit)button.setText("退出")# 等待响应鼠标点击，退出程序win.getMouse()win.close()

#!/usr/bin/env python3# -*- coding: utf-8 -*-#方块移动from tkinter import * def main():    tk = Tk()  canvas = Canvas(tk, width = 400, height = 400)  canvas.pack()   def moverectangle(event):    if event.keysym == "Up":      canvas.move(1,0,-5)    elif event.keysym == "Down":      canvas.move(1,0,5)    elif event.keysym == "Left":      canvas.move(1,-5,0)    elif event.keysym == "Right":      canvas.move(1,5,0)       canvas.create_rectangle(180,180,220,220,fill="red")  canvas.bind_all("<KeyPress-Up>",moverectangle)  canvas.bind_all("<KeyPress-Down>",moverectangle)  canvas.bind_all("<KeyPress-Left>",moverectangle)  canvas.bind_all("<KeyPress-Right>",moverectangle)  tk.mainloop() if __name__ == '__main__':  main()

#!/usr/bin/env python3# -*- coding: utf-8 -*-from graphics import * def convert(input):  celsius = eval(input.getText())  # 输入转换  fahrenheit = 9.0/5.0 * celsius + 32  return fahrenheit def colorChange(win,input):  cnum = eval(input.getText())  weight = cnum / 100.0  newcolor = color_rgb(int(255*weight),int(66+150*(1-weight)),int(255*(1-weight)))  win.setBackground(newcolor)def main():  win = GraphWin("摄氏温度转换", 400, 300)  win.setCoords(0.0, 0.0, 3.0, 4.0)  # 绘制输入接口  Text(Point(1,3),     " 摄氏温度:").draw(win)  Text(Point(2,2.7),     " (请输入： 0.0-100.0 )").draw(win)  Text(Point(1,1),     "华氏温度:").draw(win)  input = Entry(Point(2,3), 5)  input.setText("0.0")  input.draw(win)  output = Text(Point(2,1),"")  output.draw(win)  button = Text(Point(1.5,2.0),"转换")  button.draw(win)  rect = Rectangle(Point(1,1.5), Point(2,2.5))  rect.draw(win)  # 等待鼠标点击  win.getMouse()  result = convert(input)  # 转换输入  output.setText(result)  # 显示输出   # 改变颜色  colorChange(win,input)  # 改变按钮字体  button.setText("退出")  # 等待点击事件，退出程序  win.getMouse()  win.close() if __name__ == '__main__':  main()