[PyKDE] Question from a beginner

[Angel Lopez Mu�oz]

First of all, hello everybody in the list. 
I'm working with python + pyqt + all this stuff for a couple of months,
and now, I have some important questions (for me) about the way I do my
programs.
I use several windows which usually I design with qtdesigner and convert
to python code with the pyuic: "pyuic -o codeqt.py
codeqt.ui". All works ok but due to the size of the project I'm
working now (more precisely the size it will have once I have finished ;
)) I trying to do thing with order and "fine".
I will use an example: I have 2 windows (QWidgets / QDialogs is another
thing that I don't know if I 'm using well). Anyway the name of the files
will be file1qt.py and file2qt.py. And the name of the
form, and then the name of the classes are widget1 and
widget2.
I used to leave these files as it to be make modifications with the
qtdesigner and do not destroy my changes in the code (is it
correct??)
In the mainprogram "main.py" I start like
this:
import sys
from qt import *
from file1qt import *
from file2qt import *
...
...
def f1():
        ...
        ...
...
...
...
a = QApplication(sys.argv)
w1=widget1()
w2=widget2()
w1.connect(w1.somewidget1, SIGNAL("clicked()"),
somefunction)
w1.connect(w1.anotherwidget1, SIGNAL("clicked()"),
anotherfunction)
w2.connect(w2.somewidget1, SIGNAL("clicked()"),
somefunction2)
w2.connect(w2.anotherwidget1, SIGNAL("clicked()"),
anotherfunction2)
w1.show()
a.connect(a, SIGNAL('lastWindowClosed()'), exit_program)
a.exec_loop()

My questions:
        is it
correct like that???
        In fact it
works, but I don't know if it is correct to make the connections of the
widget2 in the main program.
        I wish
make different files for each widget, and do the imports in it and also
do the connections in it. But if I do that I obtain an error: 
                QPaintDevice:
Must construct a QApplication before a QPaintDevice.
                this
occurs because I do an w2=widget2()in a file in which I haven't
defined a = QApplication(sys.argv)(I suppose )
I hope I have been clear in my explanations
Thank you all very much in advance.


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