Python: getting lowest integer in list of tuples

Question

My current plan is to determine which is the first entry in a number of Tkinter listboxes highlighted using .curselection() and combining all of the resulting tuples into a list, producing this:

tupleList = [(), (), ('24', '25', '26', '27'), (), (), (), ()]

I'm wondering as to how to determine the lowest integer. Using .min(tupleList) returns only (), being the lowest entry in the list, but I'm looking for a method that would return 24.

What's the right way to get the lowest integer in any tuple in the list?

Answer 1

>>> nums = [(), (), ('24', '25', '26', '27'), (), (), (), ()]
>>> min(int(j) for i in nums for j in i)
24