Rule Definition
Referencing down the inheritance tree is against Object-Oriented coding practices. It is a way of having two-way inheritance between class and subclass. This is an indication of poor class design and use of class inheritance. Such practices increase the complexity of the application.
Remediation
Review the design of the Class hierarchy.
Violation Code Sample
class A:
def add_value(self, x):
if instance(x, B):
pass
class B(A):
pass
Reference
CISQ ASCRM-RLB-14 recommendation.
Related Technologies
Technical Criterion
CWE-1062 - Parent Class with References to Child Class
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