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1. stackoverflow.com › questions › 4912972How do I check (at runtime) if one class is a subclass of ...

   stackoverflow.com › questions › 4912972

   Mar 4, 2017 · 28 The issubclass(sub, sup) boolean function returns true if the given subclass sub is indeed a subclass of the superclass sup.

2. realpython.com › ref › builtin-functionsissubclass () | Python’s Built-in Functions – Real Python

   realpython.com › ref › builtin-functions

   issubclass() Common Use Cases The most common use cases for the issubclass() function include: Checking class hierarchies and inheritance relationships Verifying if a class implements a particular interface or abstract base class Validating input types in functions and methods that accept class objects issubclass() Real-World Example Say that you’re designing a plugin system where each ...

3. www.php.net › manual › enPHP: is_subclass_of - Manual

   www.php.net › manual › en

   Return Values ¶ This function returns true if the object object_or_class, belongs to a class which is a subclass of class, false otherwise.

4. www.geeksforgeeks.org › python › python-issubclassPython issubclass() - GeeksforGeeks

   www.geeksforgeeks.org › python › python-issubclass

   Jul 12, 2025 · Return Type: True if object is subclass of a class, or any element of the tuple, otherwise False. issubclass () Function in Python Python issubclass () is a built-in function used to check if a class is a subclass of another class or not. This function returns True if the given class is the subclass of the given class else it returns False.

5. pythonguides.com › python-isinstance-issubclassHow to Use isinstance () and issubclass () Functions

   pythonguides.com › python-isinstance-issubclass

   Apr 30, 2026 · Learn how to use Python's isinstance() and issubclass() functions with practical examples. Master type checking and class hierarchies for robust Python code.

6. docs.python.org › 3 › tutorial9. Classes — Python 3.14.5 documentation

   docs.python.org › 3 › tutorial

   1 day ago · 9. Classes ¶ Classes provide a means of bundling data and functionality together. Creating a new class creates a new type of object, allowing new instances of that type to be made. Each class instance can have attributes attached to it for maintaining its state. Class instances can also have methods (defined by its class) for modifying its state. Compared with other programming languages ...

7. People also ask

   How to check if a class is a subclass in Python?

   • Return Type: True if object is subclass of a class, or any element of the tuple, otherwise False. Python issubclass () is a built-in function used to check if a class is a subclass of another class or not. This function returns True if the given class is the subclass of the given class else it returns False.

   Python issubclass() - GeeksforGeeks

   www.geeksforgeeks.org/python/python-issubclass/

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   How to check if a class is a subclass?

   • The built-in issubclass() function checks if a given class is a subclass of another class, returning a Boolean value of True or False: The class to check if it’s a subclass. A class, tuple of classes, or a union type to check against.

   issubclass() | Python’s Built-in Functions – Real Python

   realpython.com/ref/builtin-functions/issubclass/

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   Can a function object be a class attribute?

   • Any function object that is a class attribute defines a method for instances of that class. It is not necessary that the function definition is textually enclosed in the class definition: assigning a function object to a local variable in the class is also ok. For example:

   9. Classes — Python 3.14.3 documentation

   docs.python.org/3/tutorial/classes.html

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   What is a subclass in Python?

   • A thing to keep in mind: A class is considered a subclass of itself. docs.python.org/2/library/functions.html#issubclass Subclass testing makes unit testing of many things, particularly Django's models, much easier. "Python is not Java." Why must python programmers have such chips on their shoulders? Excerpt:

   How do I check (at runtime) if one class is a subclass of another?

   stackoverflow.com/questions/4912972/how-do-i-check-at-runtime-if-one-class-is-a-subclass-of-another

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8. python-academy.org › en › handbookissubclass — Python Function Reference

   python-academy.org › en › handbook

   A comprehensive guide to Python functions, with examples. Find out how the issubclass function works in Python. Return True if class is a subclass (direct or indirect) of classinfo.