How to access constructor parameter to use as default parameter of another method in Python?

class Customer:
    def __init__(self , name, gender, address):
        self.name = name 
        self.gender = gender 
        self.address = address 
    
    def edit_profile(self, new_city, new_gender, new_address, new_name = self.name):
        self.name = new_name 

I am trying to set self.name from the constructor as default parameter for my method but
getting error "self" is not defined. Why is it showing the error why can’t I access self.name in defult parameter but I can access it inside the method with self.name

>Solution :

You need to use a sentinel value like None, then check inside the body. self is not a keyword; it’s just a parameter name that references an argument passed to the method. There is no instance available to get a name from when you define edit_profile.

def edit_profile(self, new_city, new_gender, new_address, new_name=None):
    if new_name is None:
        new_name = self.name
    ...