Help with subclasses and classes

[Terry Reedy]

On 7/2/2016 8:58 PM, cadenmrice at gmail.com wrote:
> When i run the code I get this error :
> Traceback (most recent call last):
>   File "C:/Python25/chapter2", line 18, in <module>
>     bank=InterestAccount(5,1000,0.5)
> NameError: name 'InterestAccount' is not defined
>
> I can't find the issue, any help?
>
>
> class BankAccount:
>     def __init__(self,numb,bal):
>         self.numb = numb
>         self.bal = bal
>     def showbal(self):
>         print "Your balance is", self.bal
>     def withdraw(self,wa):
>         self.bal-=wa
>         print("Your balance is now", self.bal)
>     def deposit(self,da):
>         bal+=da
>         print("Your balance is now", self.bal)
>     class InterestAccount():
>         def BankAccount__init__(self,numb,bal,intrate):
>             self.intrate=intrate
>         def addintrest(self):
>             self.bal = self.bal * self.intrate

InterestAccount should not be nested.  It should subclass BankAccount. 
You should write the subclass init as shown. Do put spaces after commas.

class InterestAccount(BankAccount):
     def __init__(self, numb, bal, intrate):
         BankAccount(self, numb, bal)
         self.intrate=intrate
     def addintrest(self):
         self.bal = self.bal * self.intrate

> bank=InterestAccount(5, 1000, 0.5)
> bank.addintrest()
> bank.showbal()

I believe the above will not do as you expect.


-- 
Terry Jan Reedy