Python issubclass() Function

class Person:
    def __init__(self, name, age):
       self.name = name
       self.age = age

class Student(Person):
     def __init__(self, name, age, school):
        super().__init__(name, age)
        self.school = school

#Check whethe a class is a  subclass of another
print(issubclass(Student, Person))

The issubclass() function checks whether a certain class is a subclass of another class.  A class is considered a subclass of another if it inherits the properties and methods from the parent class whether directly or indirectly. A subclass may also define its own unique properties and methods that are not available to the parent class.

issubclass(cls, parent)

With Builtin classes

print(issubclass(int, object))
print(issubclass(bool, int))
print(issubclass(bool, str))

Remember that all classes in Python ultimately inherit from the object class, this is why the issubclass(int, object) evaluates to True. The function also confirms that the bool class is a subclass of the int and not a subclass of the str class.

With custom classes

class Vehicle: 
    def __init__(self, name): 
        self.name = name
class Car(Vehicle): 
     def __init__(self, name, color):
         super().__init__(name) 
         self.color = color
class MiniCar(Car):
      def __init__(self, name, color):
           super.__init__(self, name, color)
print(issubclass(Car, Vehicle)) #direct
print(issubclass(MiniCar, Vehicle)) #indirect