[Tutor] Code with traceback...Re: Help me.. problem in building calculator application

[Asrarahmed Kadri]

Traceback is as under:

Traceback (most recent call last):
  File "C:\python\lib\lib-tk\Tkinter.py", line 1345, in __call__
    return self.func(*args)
  File "calculator_version2.py", line 105, in <lambda>
    self.buttonPlu = Button(self.container3,text='+',command = lambda:
self.oprC
lick('+',self.str1.get()))
AttributeError: 'str' object has no attribute 'get'



from Tkinter import *
import string


class Mycalc:

    def buttonClick(self,str2,str3):
            if str2 == ".":
                if self.dotFlag:
                    pass
                else:
                    self.dotFlag = True
                    self.operand = str3 + str2
            else:
                self.operand = str3 + str2



    def oprClick(self,str11,oprt):
        self.dotFlag = False

        if oprt == "+":
            if self.result == "0":
                self.result = str11
            else:
                self.result = string.atof(self.result) + string.atof(str11)



        elif oprt == "-":
            if self.result == "0":
                self.result = str11
            else:
                self.result = string.atof(self.result) - string.atof(str11)


        elif str2 == "*":
            if self.result == "0":
                self.result = str11
            else:
                self.result = string.atof(self.result) * string.atof(str11)


        elif str2 == "/":
            if self.result == "0":
                self.result = str11
            else:
                self.result = string.atof(self.result) / string.atof(str11)


        self.entryWidget.icursor(0)
        self.entryWidget.delete(0,END)
        self.entryWidget.insert(INSERT,self.result)





    def __init__(self,master):

        self.container1 =
Frame(master,width=200,height=200,background='brown')
        self.container1.pack()
        self.str1 = StringVar()
        self.str1 = "0"
        self.entryWidget = Entry(self.container1,textvariable=self.str1)

        self.entryWidget.pack(side=TOP)

        self.container2 = Frame(master,background='cyan')
        self.container2.pack()

        self.container3 = Frame(master,background='grey')
        self.container3.pack()

        self.operand = "0"
        self.result = "0"
        self.dotFlag = False

    def make_buttons(self):
        self.buttonOne = Button(self.container2,text='1')
        self.buttonOne.grid(row=0,column=0)
        self.buttonTwo = Button(self.container2,text='2')
        self.buttonTwo.grid(row=0,column=1)
        self.buttonThree = Button(self.container2,text='3')
        self.buttonThree.grid(row=0,column=2)
        self.buttonFour = Button(self.container2,text='4')
        self.buttonFour.grid(row=1,column=0)
        self.buttonFive = Button(self.container2,text='5')
        self.buttonFive.grid(row=1,column=1)
        self.buttonSix = Button(self.container2,text='6')
        self.buttonSix.grid(row=1,column=2)
        self.buttonSeven = Button(self.container2,text='7')
        self.buttonSeven.grid(row=2,column=0)
        self.buttonEight = Button(self.container2,text='8')
        self.buttonEight.grid(row=2,column=1)
        self.buttonNine = Button(self.container2,text='9')
        self.buttonNine.grid(row=2,column=2)
        self.buttonZero = Button(self.container2,text='0')
        self.buttonZero.grid(row=3,column=0)
        self.buttonPoint = Button(self.container2,text='.')
        self.buttonPoint.grid(row=3,column=1)

    def make_oprbuttons(self):

        self.buttonPlu = Button(self.container3,text='+',command = lambda:
self.oprClick('+',self.str1.get()))
        self.buttonPlu.pack(side=LEFT)

        self.buttonMin = Button(self.container3,text='-',command = lambda:
self.oprClick('-',self.str1.get()))
        self.buttonMin.pack(side=LEFT)

        self.buttonMul = Button(self.container3,text='*',command = lambda:
self.oprClick('*',self.str1.get()))
        self.buttonMul.pack(side=LEFT)

        self.buttonDiv = Button(self.container3,text='/',command = lambda:
self.oprClick('/',self.str1.get()))
        self.buttonDiv.pack(side=LEFT)

        self.buttonEqu = Button(self.container3,text='=',command = lambda:
self.oprClick('=',self.str1.get()))
        self.buttonEqu.pack(side=LEFT)



root = Tk()
mycalc = Mycalc(root)
mycalc.make_buttons()
mycalc.make_oprbuttons()

root.mainloop()

On 10/26/06, Kent Johnson <kent37 at tds.net> wrote:
>
> Asrarahmed Kadri wrote:
> >
> >
> > Hi folks,
> >
> > I am trying to build a rudimentary calculator application using
> Tkinter...
> >
> > I have used one Entry widget for displaying the input and output data.
> > All this is put in a class.
> > The porblem is when I click teh '+' button, teh callback function is
> > called but it gives me an error message: AttributeError: 'str' object
> > has no attribute 'get'
> >
> > I have defined a variable, self.str1 = StringVar() to bind it with the
> > entry widget and I am calling the function when + is clciked. The
> > function is as follows:
> >
> >    self.buttonPlu = Button(self.container3,text='+',command = lambda:
> > self.oprClick('+',*self.str1.get()))*
> >
> > Can't we use the get() method to access the contents of the entry
> > widget. Is there any other way to access the contents of the entry
> > widget....???
>
> The error message is saying that the object you are calling get() on is
> a string, not a StringVar. Please post complete code and the complete
> error message including traceback.
>
> Kent
>
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor
>



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