Python isinstance

The Python `isinstance()` function is used to check if an object is an instance of a specified class or any of its derived classes. The function takes two parameters: the object to be checked and the class or tuple of classes to check against.

Syntax:

isinstance(object, classinfo)

Parameters:
- object: The object to be checked.
- classinfo: A class or a tuple of classes to check against.

Return Value:
- True: If the object is an instance of the specified class or any of its derived classes.
- False: If the object is not an instance of the specified class or any of its derived classes.

Example:

class Person:
    pass

class Student(Person):
    pass

s = Student()

print(isinstance(s, Student))  # Output: True
print(isinstance(s, Person))   # Output: True
print(isinstance(s, object))   # Output: True
print(isinstance(s, str))      # Output: False