「四舍五入」是小学就学过的数学知识，也是日常计算中经常会用到的处理方法。 然而让人没想到的是，一个简单的四舍五入操作，在Python里居然这么难搞，网上还一堆错误的教程。 来看这个例子，有一个变量a为1.135，现在希望把它保留2位小数，要怎么做？

大家好，欢迎来到 Crossin 的编程教室。 平时我们用 Python 写点实用小工具，最常用的交互方式大概就是通过 print 和 input 的命令行输入输出。

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这听起来有点反直觉，但背后的设计思想，恰恰是当前 AI 工程化落地非常值得借鉴的思路。本文将结合测试开发的实际工作场景，拆解这套“自我进化”的机制，并给出测试开发在 AI 项目中可以扮演的角色和具体代码示例。

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Claude setup I wish I had from day one.

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Sadly the hotel that inspired John Cleese, when he visited with the Monty Python team in 1973, is no more. The Gleneagles was ...