# Tax Calculator--Tkinter

Marcus Gnaß gonatan at gmx.de
Mon Nov 9 19:24:10 CET 2009

```Someone Something wrote:
> > from Tkinter import *;

Try to avoid this. Better import Tkinter. And don't forget to import
Tkconstants too!

> > rate=Frame(root)
> > income=Frame(root)
> > result=Frame(root)

Why do you use three frames? You only need one. And you can make your
class TaxCalc inherit from Tkinter.Frame ...

> > The thing is, that even if I put "12" in the result text field, get
> > returns an empty string. How can I fix this?

I haven't found the reason for that, but this should work. I also added
MRABs version of printResult().

import Tkinter, Tkconstants

class TaxCalc(Tkinter.Frame):

def __init__(self, root):

Tkinter.Frame.__init__(self, root)

Tkinter.Button(self,
text='Enter tax rate',
command=self.getRate).pack()

self.rate=Tkinter.Entry(self)
self.rate.pack()

Tkinter.Button(self,
text='Enter income',
command=self.getIncome).pack()

self.income=Tkinter.Entry(self)
self.income.pack()

Tkinter.Button(self,
text='Get result',
command=self.printResult).pack()

self.result=Tkinter.Entry(self)
self.result.pack()

self.pack()

def getRate(self):
print "srate: ", self.rate.get()

def getIncome(self):
print "sincome: ", self.income.get()

def printResult(self):
try:
rate = float(self.rate.get())
income = float(self.income.get())
result = ((100.0 - rate) / 100.0) * income
self.result.insert(Tkconstants.END, str(result))
except ValueError:
print "Clear everything and start again."
print "Don't fool around with me."

root=Tkinter.Tk()
MyCalc=TaxCalc(root)
root.mainloop()

```