I know it is kind of a confusing title, but I am doing a university assignment where we have to code a banking/account managing system. For this we create three classes, one for the Customer, one for Accounts and one for the Bank where the customers and accounts are stored. Within the bank class there are commands for adding customers and accounts, for which I have used the inheritance function to just create an object of the class account/customer. I am unsure whether I have implemented this right though, since I am now trying to access these accounts or customers but have no idea how, since they are created within the bank class. I will add my code for the classes, and if anything is unclear just ask me and I will try to explain!
#🔒 Accessing object of class created within another object with inheritance
primal plinth
hexed salmonBOT
I know it is kind of a confusing title, but I am doing a university assignment w...
@primal plinth
Python help channel opened
last spade
You have indeed inherited from Account and Customer, which means Bank is now an Account and bank is a Customer, which is probably not what you wanted @primal plinth
You don't need to inherit from them. You can f.e. make an attribute self.customers in the init of the bank which is an empty list. Then you add a method like add_customer, which appends a customer object to this list.
class Customer:
def __init__(self, name: str, age: int) -> None:
self.name = name
self.age = age
class Bank:
def __init__(self) -> None:
self.customers: list[Customer] = []
self.customer_count = 0 # Just for show
def add_customer(self, new_customer: Customer) -> None:
self.customers.append(new_customer)
self.customer_count += 1
Here's a small example
Let me know if this makes sense and if you need more help @primal plinth
You are also using dict in your code (initialized with {}), but you seem to call them lists.
primal plinth
I know, I started using lists but then realized I had to use dict 😅
so like creating customers and putting them in a list? Is that essentially what you are saying?
last spade
Yeah. This problem does not really require inheritance. Inheritance makes it a "A is B" relation. But Bank is not Customer, so it does not make sense.
Instead, Bank has customers. So you can simply contain them in a list that Bank has acess to
or a dict
primal plinth
Inheritance is a big part of the like course curriculim, so I thought I had to use it somewhere in this assignment
but what youre saying makes a lot of sense
I wasn't trying to make the whole Bank class a Customer, that's why I put it under the add customer function. I thought that initalizing the customer under this function would only create a customer if the function was used
last spade
class Bank(Customer, Account): That's the line that states Bank is a sub-class of Customer & Account
So simply make it class Bank:
The () is also not necessary
primal plinth
okay
thank you
is the way you showed the only way to create a customer? Or can I also write "Customer(customer_id, personal_nbr)" under the function of add customer?
Sorry for the screenshot I just don't know how to format the code in discord
last spade
In my case, I expect that a Customer object is made, and then the method is called to add it to bank
That way bank is not responsible for customer creation
But you could of course also create a method like:
class Customer:
def __init__(self, name: str, age: int) -> None:
self.name = name
self.age = age
class Bank:
def __init__(self) -> None:
self.customers: list[Customer] = []
self.customer_count = 0 # Just for show
def add_customer(self, name: str, age: int) -> None:
new_customer = Customer(name, age)
self.customers.append(new_customer)
self.customer_count += 1
Okay
So i can't create an object by just specifying the parameters, like in the screenshot I sent? I have to name it something?
Cause later on I have to access the account to put in money, and then I need access to the account in some way, either through the name of the account or its parameters, and wouldn't your example have the same name, i.e new_customer, for every customer created?
For the customer this ofc is not relevant, but if i use the code above for the account as well I wouldn't know how to access it
last spade
If you want we could also call rq. I can maybe just explain you a little more about classes and inheritance and stuff
For your latter question, you can access something from bank like
...
my_bank = Bank(...) # Fill in arguments
my_bank.add_customer(name="John", age=55)
my_bank.add_customer(name="Clara", age=42)
customer1 = my_bank.customers[0]
Hmm, no I think I know what you are saying
sorry am a bit too shy to call
But I think I will be using a dictionary instead of a list, since that makes it easier to specify exactly which account number I need etc.
But thank you so much for your help!
quasi pivot
You have indeed inherited from Account and Customer, which means Bank is now an ...
I love this statement lol
hexed salmonBOT
Python help channel closed for inactivity