নিচের কোডটি দেখাচ্ছে অ্যাট্রিবিউট foo ক্লাস A এবং B-এ ডিফাইনড হয়েছে কি ডেরাইভড।
উদাহরণ
class A:
foo = 1
class B(A):
pass
print A.__dict__ # We see that the attribute foo is there in __dict__ of class A. So foo is defined in class A.
print hasattr(A, 'foo') # We see that class A has the attribute but it is defined.
print B.__dict__ # We see that the attribute foo is not there in __dict__ of class B. So foo is not defined in class B
print hasattr(B, 'foo') # We see that class B has the attribute but it is derived
আউটপুট
{'__module__': '__main__', 'foo': 1, '__doc__': None}
True
{'__module__': '__main__', '__doc__': None}
True