input: Write a function to define a Python class named "Person" that contains two attributes, "name" and "age". The class should have an initializer method that accepts the "name" and "age" as parameters and assigns them to the instance attributes. Create an object of this class with the name "John" and the age 25.
  assert person.name == "John"
  assert person.age == 25
output: class Person:
      def __init__(self, name, age):
          self.name = name
          self.age = age