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?

Instead of appending items to the list, use .extend method. You'll have a list of integers and then use min() to easily find the minimum. — rubik
– rubik, Commented May 1, 2012 at 11:13

John La Rooy · Accepted Answer · 2012-05-01 10:53:27Z

6

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

answered May 1, 2012 at 10:53

John La Rooy

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2 Comments

Kryptonite Over a year ago

Thank you rubik and jamylak, both solutions are brilliant. Great thanks to gnibbler, a perfect solution for this situation without having to edit a thing.

John La Rooy Over a year ago

@jamylak, Your solution would make sense if nums was being returned from a generator. Especially if it were dealing with a large amount of data

jamylak · Accepted Answer · 2012-05-01 10:48:41Z

>>> from itertools import chain >>> nums = [(), (), ('24', '25', '26', '27'), (), (), (), ()] >>> min(map(int,chain.from_iterable(nums))) 24

Vidul · Accepted Answer · 2012-05-01 11:44:08Z

0

>>> min(reduce(lambda x, y: x + y, nums))

answered May 1, 2012 at 11:44

Vidul

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4 Comments

jamylak Over a year ago

Doesn't work if nums has a number like '100' because it is checked alphabetically since it is still a str. Test it on nums = [(), (), ('24', '25', '26', '27'), (), (), (), (),('100',)] for example. Also be careful about using reduce because it is not liked in Python since there is usually a better option for almost every task.

Vidul Over a year ago

Actually '100' is less than '24', I don't understand your point.

jamylak Over a year ago

I'm pretty sure he wants to check the strings as numbers since he wants to find the minimum. He mentioned in the post: 'determine the lowest integer'

Vidul Over a year ago

@jamylak There are no integers in the structure, however your comments make sense.

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