[issue35815] Able to instantiate a subclass with abstract methods from __init_subclass__ of the ABC
Andrei Kulakov
report at bugs.python.org
Thu Jul 8 20:30:11 EDT 2021
Andrei Kulakov <andrei.avk at gmail.com> added the comment:
Ethan, here is the code I tried with 3.9, and the failure:
import abc
class Base(abc.ABC):
def __init_subclass__(cls, **kwargs):
instance = cls()
print(f"Created instance of {cls} easily: {instance}")
@abc.abstractmethod
def do_something(self):
pass
class Derived(Base):
pass
Derived()
Output:
python3 ~/temp/a.py ----VICMD----
Traceback (most recent call last):
File "/Users/ak/temp/a.py", line 53, in <module>
Derived()
TypeError: Can't instantiate abstract class Derived with abstract method do_something
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<https://bugs.python.org/issue35815>
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