[Python] Why does __init_subclass__ behave unexpectedly when using metaclasses with dynamic...

I'm trying to dynamically generate classes in Python using a custom metaclass and hook into the class creation process using __init_subclass__. However, when I generate subclasses dynamically, it seems like __init_subclass__ isn’t called the way I expect or sometimes not at all.

Example:

class Base:
def __init_subclass__(cls, **kwargs):
print(f"Initialized subclass: {cls.__name__}")
super().__init_subclass__(**kwargs)

class Meta(type):
def __new__(cls, name, bases, dct):
new_cls = super().__new__(cls, name, bases, dct)
return new_cls

for i in range(3):
class_name = f"DynamicClass{i}"
globals()[class_name] = Meta(class_name, (Base,), {})


I expected the __init_subclass__ method in Base to be triggered for each dynamically created subclass, but I’m not seeing the print output.

My question is:

• Why is __init_subclass__ not getting called here?
• Is there a proper way to invoke it or ensure it runs when classes are generated dynamically with a metaclass?

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