[Tutor] dictionary and more

Steven D'Aprano steve at pearwood.info
Tue Oct 12 00:47:48 CEST 2010

On Tue, 12 Oct 2010 03:19:22 am Jack Uretsky wrote:
> Hi-
>  	I apologize for the size of the attached file, but the question
> would make little sense if I made substantial deletions.
>  	The program gives the following error:
> Traceback (most recent call last):
>    File "/Javastuff/python/Glau_Is.py", line 131, in <module>
>      Adestin[state]()
> TypeError: 'NoneType' object is not callable

The question makes perfect sense without even looking at the attached 
file. Adestin[state] returns None, which you attempt to call as a 
function. The questions you should be asking yourself are:

- what value am I expecting it to contain?
- where in my code should that value be set?
- why is it setting None instead?

Armed with these three questions, you now know how to debug the problem 

Steven D'Aprano

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