[Tutor] Sets question

[Phil]

On Wed, 26 Apr 2017 18:56:40 -0600
Mats Wichmann <mats at wichmann.us> wrote:

> On 04/26/2017 06:33 PM, Phil wrote:
> > Another question I'm afraid.
> > 
> > If I want to remove 1 from a set then this is the answer:
> > 
> > set([1,2,3]) - set([1])
> > 
> > I had this method working perfectly until I made a change to cure
> > another bug.
> > 
> > So, I have a set represented in the debugger as {1,2,3} and again I
> > want to remove the one. Only this time the one set is represented
> > as {'1'} and, of course {'1'} is not in the set {1,2,3}.
> > 
> > Ideally, I would like {'1'} to become {1}. Try as I may, I have not
> > discovered how to remove the '' marks. How do I achieve that?
> > 
> 
> A little confused... why not just create it the way you want it? How
> do you end up with {'1'} ?

Thank you for your quick replies Mats and erky.

I use .get() to retrieve a number from an entry box, which looks like {1} (no '' marks). If I then turn this number into a set then the result is {'1'}.

num = self.entry_grid[row][col].get()
self.solution[row][col] = set([num])

As I say, my project worked perfectly with just {1} until I discovered a bug further on in the code. Perhaps I should go back to my original version and the fix the bug in some other way?

I did try {int(num)} but that resulted in an error that said something along the lines of int not being iterable. I'll have another look at that idea.

-- 
Regards,
Phil