नीचे दिए गए कोड से पता चलता है कि क्या विशेषता 'foo' को A और B वर्ग में परिभाषित या व्युत्पन्न किया गया था।
उदाहरण
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
आउटपुट
{'__module__': '__main__', 'foo': 1, '__doc__': None} True {'__module__': '__main__', '__doc__': None} True