A Python "frozenset" is simply a set object that is immutable—the objects it contains are determined at initialization time and cannot be changed thereafter. Like sets, frozensets are built into the ...

Sets in Python organize collections of unique objects. Learn how to take advantage of this powerful feature in your own code. Of the major data types built into Python, the set is one of the least ...

Python has lots of different options for mutable data structures, both directly in the language and in the standard library. Lists, dictionaries (or "dicts"), and sets are the foundation, but two of ...

Python程序设计中常用的数据结构包括字典、列表等，本节重点介绍集合（Set）。集合是Python 2.3版本引入的一种内置数据类型，由无序且不重复的元素组成，可由序列或其他可迭代对象创建。文中将系统讲解集合的基本操作，如并集、交集、差集和对称差集等 ...