🔒 Why does the sort function this way? | Python | Page 1

zenith sail Jul 26, 2024, 2:48 AM

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d = {a:[5,0,0],b:[0,2,3],c:[0,3,2]}
voted_names = sorted(d.keys())
test = sorted(voted_names, key= lambda x: d[x], reverse=True))

test ends up being [a,c,b]
how is it handling 3 seperate values in the sort is it just going from front to back?

flat timberBOT Jul 26, 2024, 2:48 AM

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zenith sail d = {a:[5,0,0],b:[0,2,3],c:[0,3,2]} voted_names = sorted(d.keys()) test = sort...

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@zenith sail

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quiet elm Jul 26, 2024, 2:50 AM

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Yes, it compares the first item to sort. If there is a tie, it uses the second item to tie break. If its a tie, it goes to the 3rd item, etc.

zenith sail Jul 26, 2024, 2:51 AM

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wow thats cool, is that documented somewhere I could have found without having to bug you?

quiet elm Jul 26, 2024, 2:53 AM

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Hmm... I'm not sure, I'm not seeing it in the list documention: https://docs.python.org/3/tutorial/datastructures.html

Python documentation

5. Data Structures

This chapter describes some things you’ve learned about already in more detail, and adds some new things as well. More on Lists: The list data type has some more methods. Here are all of the method...

zenith sail Jul 26, 2024, 2:53 AM

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ah well no worries just wanted to make sure I wasn't being a dummy and rtfm

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thank you for the answer

low salmon Jul 26, 2024, 2:54 AM

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@zenith sail when you're reading that page, you should also read the part about sort stability

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https://docs.python.org/3/howto/sorting.html

Python documentation

Sorting Techniques

Author, Andrew Dalke and Raymond Hettinger,. Python lists have a built-in list.sort() method that modifies the list in-place. There is also a sorted() built-in function that builds a new sorted lis...

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I meant this page

zenith sail Jul 26, 2024, 2:56 AM

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I think I see, the sort I listed above is essentially doing what the stability and complex sort section is saying can be done in multiple steps in one

flat timberBOT Jul 26, 2024, 3:56 AM

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#🔒 Why does the sort function this way?