假设我有两个例外：class FooError (Exception):

def __init__(self, *args, **kwargs):

default_message = 'A foo error has occurred!'

if not (args or kwargs): args = (default_message,)

super().__init__(*args, **kwargs)

class BarError (Exception):

def __init__(self, *args, **kwargs):

default_message = 'A bar error has occurred!'

if not (args or kwargs): args = (default_message,)

super().__init__(*args, **kwargs)

我有一个函数，它抛出FooError：

^{pr2}$

通常，您将使用try/except块来处理FooError：try:

foobar(-1)

except FooError:

print('Uh oh, foo error!')

sys.exit()

但是，我想抛出一个BarError，我可以稍后处理。像这样：except BarError:

print('Uh oh, bar error!')

sys.exit()

但是，在执行此操作时，我只得到两个错误的回溯：Traceback (most recent call last):

File "C:\Users\Maze\Desktop\test2.py", line 17, in

foobar(-1)

File "C:\Users\Maze\Desktop\test2.py", line 15, in foobar

raise FooError()

__main__.FooError: A foo error has occurred!

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File "C:\Users\Maze\Desktop\test2.py", line 19, in

raise BarError()

__main__.BarError: A bar error has occurred!

如何在FooError的处理程序内抛出BarError，然后在另一个except块中处理BarError？在