可以使用带有一个except语句的try和except块捕获异常吗？

Question

在Python中，可以使用相同的except语句从异常和原始try中捕获异常吗？

例如，在以下代码中：

try:
    risky_operation() # This could raise a or b, or it could work
except a:
    simple_operation() # This could raise b, or it could work
except b:
    guaranteed_operation() # This will always work

如果guaranteed_operation()提出risky_operation()，会b被调用吗？或者我必须这样做：

try:
    risky_operation() # This could raise a or b, or it could work
except a:
    try:
        simple_operation() # This could raise b, or it could work
    except b:
        guaranteed_operation() # This will always work
except b:
    guaranteed_operation() # This will always work