[PyQt] qcombobox SIGNAL issue

[singhai.nish]

As seen in image, I need that when user changes values in 1st combo, that 2nd
combo displays another list 
So, when 2nd changes that 3rd combobox displays another set. 

At present what is happening is that when 1st is changed, 2nd and 3rd both
get changed. ( only 2nd should be changed ).

How to ensure that only one signal works on one combobox ( as this is how it
is designed ). What am i missing.?

comboBoxTest.py
<http://python.6.x6.nabble.com/file/n5060177/comboBoxTest.py>  
<http://python.6.x6.nabble.com/file/n5060177/qcombobox.png> 





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