异常处理

try-exception-finally

try:
   XXX
exception XXX:
   XXXXX
finally:
	XXXX

raise

https://blog.csdn.net/qq_35541155/article/details/108809130

一般代码错误会触发特定异常

某些场景，代码没有错误，也可以人工触发特定异常，借助raise

try:
    try:
        raise ValueError(123)
    except Exception as e:
        print(e)
        raise ValueError(456)
    
except Exception as e1:
    print(e1)
    
    
    
  

123
456