I have two modules, main and notmain. I declared my custom exception in main module and want to catch it. This exception is raised in notmain module. The problem is I can't catch my exception raised in notmain module.

main.py:

class MyException(Exception):    passm = __import__('notmain')try:    m.func()except MyException as e:    print(type(e))    print('ops')

notmain.py:

def func():    import main # 1    # from main import MyException # 2    # from main import MyException as MyException # 3    raise main.MyException # 1    # raise MyException # 2, 3

I tried different import methods, with the same result. When I run main.py, I see this:

<class 'main.MyException'>opsTraceback (most recent call last):  File "D:\exception\main.py", line 6, in <module>    m.func()  File "D:\exception\notmain.py", line 6, in func    raise main.MyException # 1main.MyException

This means exception is somehow caught, but why I see traceback? And why exception class has "main.MyException" name?

Now if I modify main.py a little bit and run it:

try:    raise MyExceptionexcept MyException as e:    print(type(e))    print('ops')

I'll see what's expected:

<class '__main__.MyException'>ops

I don't know why this class MyException has different names in main.py and in notmain.py? And why Python can't catch it as expected?

Thank you :)

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