Tk variables problem

[Sven Drescher]

Hi!

I cannot understand why the following little program doesn't work correct.
It's surely a little problem, but in my program are more situations, where
such an error is raised.
I thought, there isn't a problem, but...

Tanks for hints, what I did wrong.
Sven

e.g.:
#!/usr/.../python
import Tkinter

class test:
    def __init__(self):
        self._bool=Tkinter.BooleanVar()
        self._bool.set(1)
        self.display()

    def display(self):
        print "Hi!"
        print "The value is ", self._bool.get()

a=test()
a.hallo()

error:
Variable.__init__(self, master)
self._tk = master.tk
Attribute Error: 'None' object has no attribute 'tk'
...

______________________________________
German Aerospace Research Establishment
e-mail: Sven.Drescher at dlr.de