python和wxpython編寫的計算機 (中級水平)__python

source: http://blog.163.com/lxq_102172/blog/static/133398015201231012213428/

 # -*- coding: utf-8 -*-from __future__ import divisionimport wximport mathlabels='1 1 1 1 1 MC MR MS M+ M- <- CE C +- Sqr 7 8 9 / % 4 5 6 * 1/x 1 2 3 - 0 0 . . + 2'.split()class CalFrame(wx.Frame):    def __init__(self):        wx.Frame.__init__(self,None, -1, 'Calculator', size=(230,310),                         style=wx.DEFAULT_FRAME_STYLE ^ (wx.RESIZE_BORDER | wx.MINIMIZE_BOX |wx.MAXIMIZE_BOX))        panel=wx.Panel(self)        panel.SetBackgroundColour('White')        self.createMenubar()        self.createButtons(panel)            def createMenubar(self):            menuBar=wx.MenuBar()         menu1=wx.Menu()        menuBar.Append(menu1,"View")        menu2=wx.Menu()        menuBar.Append(menu2,"Edit")        menu3=wx.Menu()        menuBar.Append(menu3,"Help")        self.SetMenuBar(menuBar)    def createButtons(self,panel):        sizer = wx.GridBagSizer(hgap=5, vgap=5)#grid sizer        self.text=wx.TextCtrl(panel, wx.NewId(),value='0', style=wx.TE_READONLY |                              wx.TE_RIGHT | wx.TE_NOHIDESEL, size=(50,50))        sizer.Add(self.text,pos=(0,0),span=(1,5),flag=wx.EXPAND)        i=0        for row in range(1,7):            for col in range(5):                i=i+1                self.button=wx.Button(panel, label=str(labels[row*5+col]),size=(40,30), id=i)                self.button.Bind(wx.EVT_BUTTON, self.Handler, self.button)                 sizer.Add(self.button,pos=(row,col))        sizer.Detach(25)        sizer.Detach(29)        sizer.Detach(25)        sizer.Detach(25)                self.button=wx.Button(panel, label='=',size=(40,60), id=30)        self.button.Bind(wx.EVT_BUTTON,self.Handler, self.button)        sizer.Add(self.button,pos=(5,4),span=(2,1),flag=wx.EXPAND)        self.button=wx.Button(panel,label='0',id=25)        self.button.Bind(wx.EVT_BUTTON,self.Handler, self.button)        sizer.Add(self.button,pos=(6,0),span=(1,2),flag=wx.EXPAND)                panel.SetSizer(sizer)        panel.Fit()        self.operand1=None        self.operand2=None        self.operator=None        self.temp1=0            def Handler(self,event):        Id=event.GetId()        if Id in [11,12,13,16,17,18,21,22,23,25]:            if self.text.GetValue()=='0':               self.text.SetValue('')               self.text.AppendText(event.GetEventObject().GetLabel())            else:                self.text.SetValue(self.text.GetValue()+event.GetEventObject().GetLabel())                        elif Id==28: #.            if '.' in self.text.GetValue()[(self.Index()+1):]:                self.text.SetValue(self.text.GetValue())            else:                self.text.SetValue(self.text.GetValue()+event.GetEventObject().GetLabel())                        elif Id==8: #C            self.text.SetValue('0')            self.operand1=None            self.operand2=None            self.operator=None            self.temp1=0                    elif Id==7: #CE            self.text.SetValue(self.text.GetValue()[0:(self.Index()+1)])        elif Id==6: #<-            self.text.SetValue(self.text.GetValue()[0:-1])            if len(self.text.GetValue())<=0:                self.text.SetValue('0')                         elif Id==9: #+-            if self.text.GetValue()=='0':                pass            else:                           if self.text.GetValue()[0]!='-' & self.operand2==None:                                    self.text.SetValue('-'+self.text.GetValue())                else:                    self.text.SetValue(self.text.GetValue()[1:])                if self.operand2!=None:                    pass                        elif Id==10: #Sqr            try:                self.text.SetValue(str(math.sqrt(float(self.text.GetValue()))))            except ValueError:                 self.text.SetValue('ValueError:math domain error')                    elif Id==29: #+            self.temp1=self.temp1+1            self.operator='+'            self.Repeat()        elif Id==24: #-            self.temp1=self.temp1+1            self.operator='-'            self.Repeat()        elif Id==19: #*            self.temp1=self.temp1+1            self.operator='*'            self.Repeat()        elif Id==14: #/            self.temp1=self.temp1+1            self.operator='/'            self.Repeat()                    elif Id==20: #1/x            try:                self.text.SetValue(str(1.0/(float(self.text.GetValue()))))            except ZeroDivisionError:                self.text.SetValue('ZeroDivisionError: float division by zero')                                    elif Id==15: #%            self.operand2=eval(self.operand1) * eval(self.operand2)/100.0            self.operand2=str(self.operand2)            self.Result()            self.temp1=0                    elif Id==30: #=            self.Result()            self.temp1=0          if self.temp1>=2:            try:                if self.operand2!=None and self.operand2!='' and self.operand1!=None and self.operator!=None:                    self.text.SetValue(str(eval(self.operand1 + self.operator + self.operand2)))                    self.operand1=self.text.GetValue()                    self.operand2=None                else:                    pass            except ZeroDivisionError:                self.text.SetValue('ZeroDivisionError: float division by zero')            self.Repeat()            self.temp1=1                    if self.temp1%2==0:            if self.operator==None:                self.operand1=self.text.GetValue()            else:                self.operand1=self.text.GetValue()[0:self.Index()]        else:                     self.operand2=self.text.GetValue()[(self.Index()+1):]        print self.operand1,self.operator, self.operand2    def Index(self):  #���ز������±�        a=list(self.text.GetValue())        if self.operator==None or self.operator not in a:            b=-1        else:            b=a.index(self.operator)        return b    def Repeat(self):        if self.text.GetValue()[-1] in '+-*/':           self.text.SetValue(self.text.GetValue()[0:self.Index()]                              +self.operator)        else:           self.text.SetValue(self.text.GetValue()+self.operator)                                                    def Result(self):        try:            if self.operand1!=None and self.operator!=None:                self.text.SetValue(str(eval(self.operand1 + self.operator + self.operand2)))                self.operand1=None                self.operand2=None                self.operator=None                self.temp1=0        except ZeroDivisionError:            self.text.SetValue('ZeroDivisionError: float division by zero')         app=wx.PySimpleApp()frame=CalFrame()frame.Show()app.MainLoop()