规定属于其父元素的第二个子元素的每个 p 的背景色：p:nth-child(2){background:#ff0000;}1定义和用法:nth-child(n) 选择器匹配属于其父元素的第 N 个子元素，不论元素的类型。n 可以是数字、关键词或公式。该选择器选取父元素的第 N 个子元素，与类型无关。2:nth-of-type() 选择器，该选择器选取父元素的...
**nth-child in Python: A Comprehensive Guide**
## Introduction
When working with Python, you often come across scenarios where you need to select specific elements from a list o
