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class Employee:
new_id = 1
def __init__(self):
self.id = Employee.new_id
Employee.new_id += 1
def say_id(self):
print("My id is {}.".format(self.id))
class User:
def __init__(self, username, role="Customer"):
self.username = username
self.role = role
def say_user_info(self):
print("My username is {}".format(self.username))
print("My role is {}".format(self.role))
# Write your code below
class Admin(Employee, User):
def __init__(self):
super().__init__()
User.__init__(self, self.id, "Admin")
def say_id(self):
super().say_id()
print("I am an admin.")
e1 = Employee()
e2 = Employee()
e3 = Admin()
e3.say_user_info()
Take an attention on the line 22 and 23
If class Admin inherits from 2 classes is there any another possibilities to call parent constructor accept using super() or call it on instance ?
As far as I understand .super() does refer to the first class argument.
So my question is:
If e.g. class inherits from 5 parents classes is there only one way to change they constructors by calling it on instance (if we need it of course) with first .super()?
I am still quite uncertain with the super() method in this exercise. I thought <super().init()> under the Admin class should call the Employee but the question ask for User, so why do we still need this line <super().init()>
Why can’t we just input this directly <User.init(self, self.id, “Admin”)> directly?
class Hybrid(Dog, Wolf):
def action(self):
super().action()
Wolf.action(self)
I don’t quite get why we don’t have to provide self in super().action() but we do have to do it in Wolf.action(self).
If a Hybrid object is what is going to call the method action(), isn’t the self parameter implicit in the context? It seems so, because it is for super.action(). But why do we have to be explicit with Wolf?
Another question: if we are calling a method of the Wolf class using the class name, wouldn’t it be the same if the subclass doesn’t inherit from it? What is the purpose of multi inheritance then if the calls are basically the same?
So the exercise says:
“This form of multiple inheritance can be useful by adding functionality from a class that does not fit in with the current design scheme of the current classes.”
I am not going to pretend like I understand what that means at all, but am guessing that said sentence tells us when we use this type of multiple inheritance, and that’s all I can glean from that sentence.
When do you use this type of inheritance?
I hava a question about the sub_class Admin() in this exercise.
Admin inherits from both Employee and User and, therefore, the constructors from Employee and User are accesible to Admin, How come Admin still needs its own constructor ? Why not just use the inherited constructors?
) below.
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