Python 计算器

初学Python，从计算器做起。

Python2.5＋wxPython

1. #!/bin/env python
2. # -*- coding: cp936 -*-
3. #   above for resolve chinese issue
4. import wx
5. import math
6. class MyFrame(wx.Frame):
7.     def __init__(self):
8.         wx.Frame.__init__(self, None, -1, "计算器Calculator", size=(270, 250))
9.         panel = wx.Panel(self, -1)
10.         self.textBox1 = wx.TextCtrl(panel, -1, "", pos=(40, 10),size=(200,30))
11.         wx.StaticText(panel, -1, "R:", pos=(10, 12))
12.         self.button7 = wx.Button(panel, -1, "7", pos=(54, 85),size=(36,26))
13.         self.button8 = wx.Button(panel, -1, "8", pos=(92, 85),size=(36,26))
14.         self.button9 = wx.Button(panel, -1, "9", pos=(132,85),size=(36,26))
15.         self.button4 = wx.Button(panel, -1, "4", pos=(54, 116),size=(36,26))
16.         self.button5 = wx.Button(panel, -1, "5", pos=(92, 116),size=(36,26))
17.         self.button6 = wx.Button(panel, -1, "6", pos=(132,116),size=(36,26))
18.         self.button1 = wx.Button(panel, -1, "1", pos=(54, 147),size=(36,26))
19.         self.button2 = wx.Button(panel, -1, "2", pos=(92, 147),size=(36,26))
20.         self.button3 = wx.Button(panel, -1, "3", pos=(132, 147),size=(36,26))
21.         self.button0 = wx.Button(panel, -1, "0", pos=(54, 178),size=(36,26))
22.         self.buttonplusorminus = wx.Button(panel, -1, "+/-", pos=(92, 178),size=(36,26))
23.         self.buttondot = wx.Button(panel, -1, ".", pos=(132, 178),size=(36,26))
24.         self.buttonmul = wx.Button(panel, -1, "*", pos=(171, 85),size=(36,26))
25.         self.buttondiv = wx.Button(panel, -1, "/", pos=(171, 116),size=(36,26))
26.         self.buttonminus = wx.Button(panel, -1, "-", pos=(171, 147),size=(36,26))
27.         self.buttonplus = wx.Button(panel, -1, "+", pos=(171, 178),size=(36,26))
28.         self.buttonsqrt = wx.Button(panel, -1, "sqrt", pos=(211, 85),size=(36,26))
29.         self.buttonpercent = wx.Button(panel, -1, "%", pos=(211, 116),size=(36,26))
30.         self.buttonrev = wx.Button(panel, -1, "1/x", pos=(211, 147),size=(36,26))
31.         self.buttonequal = wx.Button(panel, -1, "=", pos=(211, 178),size=(36,26))
32.         self.buttoncancel = wx.Button(panel, -1, "C", pos=(200, 54),size=(47,26))
34.         self.button1.Bind(wx.EVT_BUTTON, self.OnClick)
35.         self.button2.Bind(wx.EVT_BUTTON, self.OnClick)
36.         self.button3.Bind(wx.EVT_BUTTON, self.OnClick)
37.         self.button4.Bind(wx.EVT_BUTTON, self.OnClick)
38.         self.button5.Bind(wx.EVT_BUTTON, self.OnClick)
39.         self.button6.Bind(wx.EVT_BUTTON, self.OnClick)
40.         self.button7.Bind(wx.EVT_BUTTON, self.OnClick)
41.         self.button8.Bind(wx.EVT_BUTTON, self.OnClick)
42.         self.button9.Bind(wx.EVT_BUTTON, self.OnClick)
43.         self.button0.Bind(wx.EVT_BUTTON, self.OnClick)
44.         self.buttondot.Bind(wx.EVT_BUTTON, self.OnClick)
45.         self.buttonmul.Bind(wx.EVT_BUTTON, self.OnClick)
46.         self.buttondiv.Bind(wx.EVT_BUTTON, self.OnClick)
47.         self.buttonminus.Bind(wx.EVT_BUTTON, self.OnClick)
48.         self.buttonplus.Bind(wx.EVT_BUTTON, self.OnClick)
49.         
50.         self.buttonequal.Bind(wx.EVT_BUTTON, self.OnCompute)
51.         self.buttonsqrt.Bind(wx.EVT_BUTTON, self.OnSqrt)
52.         self.buttonrev.Bind(wx.EVT_BUTTON, self.OnRev)
53.         self.buttonpercent.Bind(wx.EVT_BUTTON, self.OnPert)
54.         self.buttoncancel.Bind(wx.EVT_BUTTON, self.OnCancel)
55.         self.buttonequal.SetDefault()
56.     def OnClick(self, event):
57.         self.textBox1.SetValue(self.textBox1.GetValue()+event.GetEventObject().GetLabel())
58.     def OnCompute(self, event):
59.         if self.textBox1.GetValue() != '':
60.             self.textBox1.SetValue(str(eval(self.textBox1.GetValue())))
61.     def OnSqrt(self, event):
62.         self.textBox1.SetValue(str(math.sqrt(eval(self.textBox1.GetValue()))))
63.     def OnRev(self, event):
64.         self.textBox1.SetValue(str(1.0/(eval(self.textBox1.GetValue()))))
65.     def OnPert(self, event):
66.         self.textBox1.SetValue(str((eval(self.textBox1.GetValue()))/100.0))
67.     def OnCancel(self, event):
68.         self.textBox1.SetValue("")
69. if __name__ == '__main__':
70.     print ("Start")
71.     app = wx.PySimpleApp()
72.     frame = MyFrame()
73.     frame.Show(True)
74.     app.MainLoop()