Python 2 检测到除块之外的异常但未检测到 Python 3

Question

I found this piece of code detecting exception within the try block itself when run in python 2.

import sys
for i in range(3):
    try:
        if sys.exc_info()[1]:
            print("Exception found")
        else:
            print("Exception not found")
        raise Exception("Random exception")
    except Exception as e:
        pass

Output generated by python 2.7.17 -

Exception not found
Exception found
Exception found

When run on python 3, the exception is not detected.
Output generated by python 3.7.7 -

Exception not found
Exception not found
Exception not found

Why does python 2 behave this way? Is there any workaround in python 2 to avoid this behavior?
Wrong exception detection is throwing off my application's logging when run using gunicorn.

Answer 1

Regarding the meaning of "handling an exception" there is a difference between Python 2 and Python 3 in this context. It's best visualized with a diff of the relevant docs entry ( Py2 vs. Py3 ):

So while in Python 3 this definition includes only the exception being currently handled , in Python 2 also the most recently handled exception is included.