[Tutor] My best GUI app so far.

[Jacob S.]

Here's the code. If you have time, look it over and give me suggestions for
improvement!
(big toothy grin)

### Start of Calculator.py ###
from __future__ import division
from Tkinter import *

class Application(Frame):
    def ctb(self):
        if self.shouldblank:
            self.distext.set('')
            self.shouldblank = False
    def adddigit0(self):
        self.ctb()
        self.distext.set(self.distext.get()+'0')
    def adddigit1(self):
        self.ctb()
        self.distext.set(self.distext.get()+'1')
    def adddigit2(self):
        self.ctb()
        self.distext.set(self.distext.get()+'2')
    def adddigit3(self):
        self.ctb()
        self.distext.set(self.distext.get()+'3')
    def adddigit4(self):
        self.ctb()
        self.distext.set(self.distext.get()+'4')
    def adddigit5(self):
        self.ctb()
        self.distext.set(self.distext.get()+'5')
    def adddigit6(self):
        self.ctb()
        self.distext.set(self.distext.get()+'6')
    def adddigit7(self):
        self.ctb()
        self.distext.set(self.distext.get()+'7')
    def adddigit8(self):
        self.ctb()
        self.distext.set(self.distext.get()+'8')
    def adddigit9(self):
        self.ctb()
        self.distext.set(self.distext.get()+'9')
    def adddigitdot(self):
        if not self.distext.get().count('.'):
            self.ctb()
            self.distext.set(self.distext.get()+'.')
    def equal(self):
        if self.action:
            self.newnum = self.distext.get()
            self.newnum = str(eval(self.oldnum+self.action+self.newnum))
            self.distext.set(self.newnum)
            self.oldnum = '0'
            self.action = ''
            self.shouldblank = True
    def add(self):
        if self.action:
            self.equal()
            self.oldnum = self.distext.get()
            self.action = '+'
        else:
            self.oldnum = self.distext.get()
            self.action = '+'
            self.shouldblank = True
    def subtract(self):
        if self.action:
            self.equal()
            self.oldnum = self.distext.get()
            self.action = '-'
        else:
            self.oldnum = self.distext.get()
            self.action = '-'
            self.shouldblank = True
    def multiply(self):
        if self.action:
            self.equal()
            self.oldnum = self.distext.get()
            self.action = '*'
        else:
            self.oldnum = self.distext.get()
            self.action = '*'
            self.shouldblank = True
    def divide(self):
        if self.action:
            self.equal()
            self.oldnum = self.distext.get()
            self.action = '/'
        else:
            self.oldnum = self.distext.get()
            self.action = '/'
            self.shouldblank = True
    def clear(self):
        self.action = ''
        self.oldnum = '0'
        self.distext.set('0')
        self.shouldblank = True
    def memrecall(self):
        self.distext.set(self.memory)
        self.shouldblank = True
    def memminus(self):
        self.memory = str(eval(self.memory+"-"+self.distext.get()))
        self.shouldblank = True
    def memplus(self):
        self.memory = str(eval(self.memory+"+"+self.distext.get()))
        self.shouldblank = True



    def createWidgets(self):
        self.distext = StringVar()
        self.display =
Entry(self,textvariable=self.distext,width=22,justify='right')
        self.display.grid(row=0,column=1,columnspan=4)

        self.b0 =
Button(self,text='0',command=self.adddigit0,width=4,height=3)
        self.b0.grid(row=5,column=1)
        self.b1 =
Button(self,text='1',command=self.adddigit1,width=4,height=3)
        self.b1.grid(row=4,column=1)
        self.b2 =
Button(self,text='2',command=self.adddigit2,width=4,height=3)
        self.b2.grid(row=4,column=2)
        self.b3 =
Button(self,text='3',command=self.adddigit3,width=4,height=3)
        self.b3.grid(row=4,column=3)
        self.b4 =
Button(self,text='4',command=self.adddigit4,width=4,height=3)
        self.b4.grid(row=3,column=1)
        self.b5 =
Button(self,text='5',command=self.adddigit5,width=4,height=3)
        self.b5.grid(row=3,column=2)
        self.b6 =
Button(self,text='6',command=self.adddigit6,width=4,height=3)
        self.b6.grid(row=3,column=3)
        self.b7 =
Button(self,text='7',command=self.adddigit7,width=4,height=3)
        self.b7.grid(row=2,column=1)
        self.b8 =
Button(self,text='8',command=self.adddigit8,width=4,height=3)
        self.b8.grid(row=2,column=2)
        self.b9 =
Button(self,text='9',command=self.adddigit9,width=4,height=3)
        self.b9.grid(row=2,column=3)
        self.bdot =
Button(self,text='.',command=self.adddigitdot,width=4,height=3)
        self.bdot.grid(row=5,column=2)
        self.equalsign =
Button(self,text="=",command=self.equal,width=4,height=3)
        self.equalsign.grid(row=5,column=3)
        self.plussign =
Button(self,text='+',command=self.add,width=4,height=3)
        self.plussign.grid(row=5,column=4)
        self.minussign =
Button(self,text="-",command=self.subtract,width=4,height=3)
        self.minussign.grid(row=4,column=4)
        self.timessign =
Button(self,text='x',command=self.multiply,width=4,height=3)
        self.timessign.grid(row=3,column=4)
        self.divsign =
Button(self,text='/',command=self.divide,width=4,height=3)
        self.divsign.grid(row=2,column=4)
        self.clearb =
Button(self,text='ON/C',command=self.clear,width=4,height=3)
        self.clearb.grid(row=1,column=4)
        self.mrc =
Button(self,text='MRC',command=self.memrecall,width=4,height=3)
        self.mrc.grid(row=1,column=1)
        self.mm =
Button(self,text="M-",command=self.memminus,width=4,height=3)
        self.mm.grid(row=1,column=2)
        self.mp =
Button(self,text="M+",command=self.memplus,width=4,height=3)
        self.mp.grid(row=1,column=3)


    def __init__(self, master=None):
        Frame.__init__(self,master)
        self.master.title("Calculator by Jacob, Inc.")
        self.pack(fill='both')
        self.oldnum = '0'
        self.memory = '0'
        self.action = ''
        self.shouldblank = True
        self.createWidgets()

app = Application()
app.mainloop()
### End of Calculator.py ###

Is there some way that I could loop over those button definitions?

proposal - code

a = """
def adddigit%s(self):
    self.ctb()
    self.distext.set(self.distext.get()+'%s')
"""
for i in range(10):
    exec a % (i,i)

Pretty cool, huh? I've got my thinking cap on today!

Thanks in advance for suggestions,
Jacob