Re: What is the difference between 'except IOError as e:' and 'except IOError, e:'

[Marcus Gnaß]

See also
http://docs.python.org/dev/3.0/whatsnew/2.6.html#pep-3110-exception-handling-changes
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Re: A beginner question about GUI use and development

[Marcus Gnaß]

uap12 wrote:

 When i givet the program away i like to pack it, so the enduser
 just run it, i don't like to tell the user to install Python, and/or
 som GUI package. is this possible.

So Tkinter would be your choice, cause its shipped with Python ...

 In the beginning it is okej to code the gui by hand to learn
 but after that i like som kind of GUI-designtool, and god
 to recommade ??

http://wiki.python.org/moin/GuiProgramming
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Re: Tax Calculator--Tkinter

[Marcus Gnaß]

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()

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