Problem with inherits and circular imports

Question

I want to implement a class in Python that returns an instance of another class when executed.

from Bmodule import B
class A:
    def __new__(cls):
        return B

And in the module Bmodule:

from Amodule import A
class B(A):
    def __init__(self):
        print("Class B was built")

But this is giving me an import error, probably due to the circular import. I know I could put both classes in a unique module, but I prefer to have them in separate ones. How can I fix it?

Thanks!!

not only the import is circular: your class definition alone is circular. this can not work... — hiro protagonist, Apr 15 '19 at 11:48
potential duplicate of https://stackoverflow.com/questions/894864/circular-dependency-in-python — georg-un, Apr 15 '19 at 11:49
Possible duplicate of [Python circular importing?](https://stackoverflow.com/questions/22187279/python-circular-importing) — Rahul, Apr 15 '19 at 11:49

score 1 · Accepted Answer · answered Apr 15 '19 at 12:09

1

Something like this:

class A:
    def __new__(cls):
        from Bmodule import B
        return super().__new__(B)

class B(A):
    def __init__(self):
        print("Class B was built")

print(A())

answered Apr 15 '19 at 12:09

Alex Hall

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Problem with inherits and circular imports

1 Answers1