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![image](https://user-images.githubusercontent.com/10359818/159098794-3e0e39d7-bae6-49f0-bbcb-d4e10169726a.png)

![image](https://user-images.githubusercontent.com/10359818/159099165-955e177f-3907-4fa8-8ff3-81f3b91d5330.png) Python不倾向于对变量的类型做隐式转换，应该算强类型语言吧。

![image](https://user-images.githubusercontent.com/10359818/159103386-cc948678-dc39-41a6-91cb-81b589a97d02.png) 编译器后端的主要职责 ***是*** 对前端下发的IR做进一步的计算图优化