目录一、Optional是什么二、用法详解：从青铜到王者1. 基础用法2. 配合类型检查（Mypy实战）3. 与Union的等价写法三、实战案例：避免“None地狱”案例1：安全处理API响应案例2：链式调用避免崩溃四、原理解
目录背景1. None 介绍2. NaN和np.nan 介绍3. Null 介绍4. NaT 介绍5. 编程客栈等值性总结背景
I\'m trying to make sense on the best way to do automatize a series of things in a row in order to deploy a web-app and haven\'t yet came up with a s开发者_开发问答uitable solution. I would like to:
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