[Python-ideas] ImportError raised for a circular import

Antoine Rozo antoine.rozo at gmail.com
Tue Jun 13 15:13:01 EDT 2017


But circular imports are sometimes needed in modules.
For example when you have two classes in two different modules that
reference each other in their methods (and because you can't pre-declare
classes like in C++).

2017-06-13 20:30 GMT+02:00 Barry Scott <barry at barrys-emacs.org>:

> Recently I fell into the trap of creating a circular import and yet again
> it took time to figure out what was wrong.
>
> I'm wondering why the python import code does not detect this error and
> raise an exception.
>
> I took a look at the code and got as far as figuring out that I would need
> to add the detection to the
> python 3 import code. Unless I missed something I cannot get the detection
> without
> modifying the core code as I could see no way to hook the process cleanly.
>
> Is it reasonable idea to add this detection to python?
>
> I am willing to work on a patch.
>
> Barry
>
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-- 
Antoine Rozo
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