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Pumpkin

•Created by Simbaclaws on 1/11/2025 in #questions

Python issue with inheritence

$ python python3.py
MyInheritedClass is a subclass of MySuperClass
instance is a subclass of MySuperClass

$ python python3.py
MyInheritedClass is a subclass of MySuperClass
instance is a subclass of MySuperClass

4 replies

TTCTheo's Typesafe Cult

•Created by Simbaclaws on 1/11/2025 in #questions

Python issue with inheritence

inheritedClass is a reference to the class itself, not an instance of the class. Hence isinstance is False, because it is just an instance of type.

import importlib
from python1 import MySuperClass

module = importlib.import_module('python2')
inheritedClass = getattr(module, 'MyInheritedClass')
if issubclass(inheritedClass, MySuperClass):
    print("MyInheritedClass is a subclass of MySuperClass")
else:
    print("MyInheritedClass isn't a subclass of MySuperClass")

instance = inheritedClass()
if isinstance(instance, MySuperClass):
    print("instance is a subclass of MySuperClass")
else:
    print("instance isn't a subclass of MySuperClass")

import importlib
from python1 import MySuperClass

module = importlib.import_module('python2')
inheritedClass = getattr(module, 'MyInheritedClass')
if issubclass(inheritedClass, MySuperClass):
    print("MyInheritedClass is a subclass of MySuperClass")
else:
    print("MyInheritedClass isn't a subclass of MySuperClass")

instance = inheritedClass()
if isinstance(instance, MySuperClass):
    print("instance is a subclass of MySuperClass")
else:
    print("instance isn't a subclass of MySuperClass")

4 replies

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