Aug 2, 2010 · Converting to lists and back is a lot of unnecessary overhead and seems to defeat the purpose of sets. Consider the answer by @nyuszika7h as well as the solution in …

From Python version 2.6 on you can use multiple arguments to set.intersection(), like u = set.intersection(s1, s2, s3) If the sets are in a list, this translates to: u = set.intersection(*setlist) …

Jan 7, 2013 · 1 Yes, Python sets are mutable because we can add, delete elements into set, but sets can't contain mutable items into itself. Like the below code will give an error: s = …

Apr 15, 2015 · Compute the union of the sets using: c = a | b Sets are unordered sequences of unique values. a | b, or a.union(b), is the union of the two sets — i.e., a new set with all values …

Since Python 3.7, dicts keep insertion order. So if you want to order a set but still want to be able to do membership checks in constant time, you can create a dictionary from the sorted list …

Jun 11, 2015 · Union of multiple sets in python Asked 10 years, 4 months ago Modified 3 years, 4 months ago Viewed 85k times

The documentation appears to suggest that difference can take multiple sets, so it is possible that it might be more efficient and clearer for things like: s1 = set([1, 2, 3, 4])

Efficiently compare two sets in Python Asked 8 years, 1 month ago Modified 1 year, 8 months ago Viewed 85k times

Jul 2, 2013 · Assume that S and T are assigned sets. Without using the join operator |, how can I find the union of the two sets? This, for example, finds the intersection: S = {1 ...

Oct 31, 2009 · While others have pointed out that there is no built-in implementation of an insertion-order preserving set in Python (yet), I am feeling that this question is missing an …