OOP_kickStart

class Person:

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

    #def set_details(self, name, age):
    #    self.name = name
    #    self.age = age

        # self.name and self.age are instance variable
        # An instance variable is a variable which is declared in a class
        # but outside of constructors, methods, or blocks.
        # Instance variables are created when an object is instantiated,
        # and are accessible to all the constructors, methods,
        # or blocks in the class.
        # It lives as long as the object lives.
        
        # name and age are parameters / arguments
        # A parameter is the variable listed inside the parentheses in the function
        # definition. An argument is the value that is sent to the function
        # when it is called.
        
    def display(self):
        # print("I am a person", self)
        print("I am a person", self.name)

    def greet(self):
        #print("Hello, how are you doing", self)

        if self.age < 90:
            print("Hello, how are you doing?")
        else:
            print("Hello, how do you do")
        self.display()

p1 = Person("john",20)
p2 = Person("Tim",45)

#p1 = Person()
#p2 = Person()
#p1.set_details('Bob', 20)
#p2.set_details('Ted',90)

#p1.display()
p1.greet()

#p2.display()
p2.greet()