Python's special methods (also called "dunder methods" because they are surrounded by double underscores) give classes built-in behavior when they interact with Python’s syntax or standard functions.

在性能要求较高的应用场景中，Python常因其执行速度不及C、C++或Rust等编译型语言而受到质疑。然而通过合理运用Python标准库提供的优化特性，我们可以显著提升Python代码的执行效率。本文将详细介绍几种实用的性能优化技术。

1.解释Python列表推导式 列表推导式用于将一个列表转换为另一个列表。元素可以有条件地包含在新列表中，并且每个元素都可以根据需要进行转换。它由一个 for 子句的表达式组成，并用方括号括起来。 list = [i for i in ...

The Samsung Galaxy S25 Ultra packs everything you want in a modern flagship, including a massive display that supports the S Pen stylus, all the Galaxy AI features you dreamed about, a versatile ...