https://github.com/stoicsapien1/DSMP-2.0

We can create new attribues for a object outside a class.

class Person:

    def __init__(self,name_input,country_input):

        self.name = name_input
        self.country_input = country_input.lower()
        
    def greet(self):

        if self.country_input=="india":
            print("Namaste",self.name)

        else:
            print("Hello!",self.name)

Here we have defined only two attributes name and country_input ,but still we can define new attributes for a particular object.

Python allows you to create new attributes for objects outside the class definition by simply assigning them (like p.gender = "male").

These dynamic attributes are specific to that object instance and don't affect the class or other instances.

Reference variable:

# object without a refernce

class Person:

    def __init__(self):
        self.name = "nitish"
        self.gender = "male"

p = Person()
q=p

Note: p is just a reference variable it means that it is not the object itself,but it just contains the address to that object.

The id of p and q are the same,it means both contains the address of the same object.

Also,if you will change the attribute using a particular variable,the attribute of another variable will also going to get changed.

Summary:

Reference variables in Python store memory addresses, not objects themselves.

Key Points: