Method attribute is not updating itself even though I'm clearly assigning a different value to it

Question

Upon updating a value, the __init__ method still uses the old attribute value.

class Email:
    def __init__(self, name):
        self.name = na         


        

Answer 1

In this example, self.email is being assigned in the __init__ method of the class, which is only called when an instance of Email is created. As such, when self.name is reassigned, self.email is not changed. To work around this, you can use a property decorator:

class Email:
  def __init__(self, name):
    self._name = name
    self._email = f'{name}@hotmail.com'
  def details(self):
    return f'{self._name} | {self._email}'
  @property
  def name(self):
    return self._name
  @name.setter
  def name(self, _new_name):
    self._name = _new_name
    self._email = f'{_new_name}@hotmail.com'

person = Email("James")
print(person.details())
person.name = "Michael"
print(person.details())

Output:

James | James@hotmail.com
Michael | Michael@hotmail.com