Yes, the check on this line will pass. But column and segment checks will fail. Because the only way to get 45 from different numbers from 1 to 9 is 1+2+3+4+5+6+7+8+9.
Look at my solution. It works. Everytime

1+1+1+5+5+5+9+9+9=45

However, this is not a valid row/column.

1+2+3+4+5+6+7+8+9=45

You should have checked to see if the sum of the list is 45. You don't have to keep checking the list of numbers from 1 to 9

That would be the same, sure, but it seemed more explicit.

You're right ;-)

you sure? ;)

That's a basic python trick ;-)

Oh, and don't forget the "spoiler" flag, otherwise these comments are displayed on the dashboard.

Akthough I agree with the principle (see DRY), turning such a short piece of code into a separate function would not make it more simple or readable.