How to fix TypeError when checking if variable of type A inherits from type ... in Python

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We're excited to share with you our newest video, "How to solve TypeError when checking if variable of type A inherits from type B using incorrect methods or syntax. in Python". 🎥 This series is meticulously designed to arm you with knowledge 🧠 and skills 🛠️ to overcome frequent coding challenges.

Today, we will decipher 🔎 and resolve a common error faced by Python coders: the bit hard to solve TypeError when checking if variable of type A inherits from type B using incorrect methods or syntax.. Here is a snapshot of the code of the video:

Troubling Scenario: ❗️

class A:
pass

class B:
pass

a = A()

# Incorrect way to check inheritance
if a is B:
print("a is an instance of B")

Unwanted Result: 🚫
TypeError when checking if variable of type A inherits from type B using incorrect methods or syntax.

Effective Resolution: ✔️

class A:
pass

class B:
pass

a = A()

# Correct way to check inheritance
if isinstance(a, B):
print("a is an instance of B")

Desired Output: 🏁

In this detailed walkthrough, we will illuminate 💡 the underlying cause of this error, and offer a comprehensive explanation: Code1 incorrectly uses 'is' for type checking, which tests object identity, not type. Code2 correctly uses 'isinstance()' to check if 'a' is an instance of class B. 🎯

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