python:集合

標籤：

A set is an unordered collection with no duplicate elements. Basic uses include membership testing and eliminating duplicate entries. Set objects also support mathematical operations like union, intersection, difference, and symmetric difference.

Curly braces or the set() function can be used to create sets. Note: to create an empty set you have to use set(), not {}; the latter creates an empty dictionary.

 

“集合”是一種沒有重複元素的無序集合，可以用大括弧或set()來建立，但空集合只能用set()來建立，{}會建立另一種資料類型：字典。

python:集合