Need help on a project To :"Create a class called BankAccount with the following parameters "

[Albert Visser]

On Sat, 05 Mar 2016 08:41:39 +0100, <lucasfrank254 at gmail.com> wrote:

> On Saturday, December 12, 2015 at 1:05:29 AM UTC-8, Harbey Leke wrote:
>> Create a class called BankAccount
>>
>> .Create a constructor that takes in an integer and assigns this to a  
>> `balance` property.
>>
>> .Create a method called `deposit` that takes in cash deposit amount and  
>> updates the balance accordingly.
>>
>> .Create a method called `withdraw` that takes in cash withdrawal amount  
>> and updates the balance accordingly. if amount is greater than balance  
>> return `"invalid transaction"`
>>
>> .Create a subclass MinimumBalanceAccount of the BankAccount class
>>
>> Please i need help on this i am a beginer into python programming.
>>
>>
>> Also below is a test case given for this project
>>
>>
>> import unittest
>> class AccountBalanceTestCases(unittest.TestCase):
>>   def setUp(self):
>>     self.my_account = BankAccount(90)
>>
>>   def test_balance(self):
>>     self.assertEqual(self.my_account.balance, 90, msg='Account Balance  
>> Invalid')
>>
>>   def test_deposit(self):
>>     self.my_account.deposit(90)
>>     self.assertEqual(self.my_account.balance, 180, msg='Deposit method  
>> inaccurate')
>>
>>   def test_withdraw(self):
>>     self.my_account.withdraw(40)
>>     self.assertEqual(self.my_account.balance, 50, msg='Withdraw method  
>> inaccurate')
>>
>>   def test_invalid_operation(self):
>>     self.assertEqual(self.my_account.withdraw(1000), "invalid  
>> transaction", msg='Invalid transaction')
>>
>>   def test_sub_class(self):
>>     self.assertTrue(issubclass(MinimumBalanceAccount, BankAccount),  
>> msg='No true subclass of BankAccount')
>
> my solution is:
>
> class BankAccount(object):
>     def __init__(self, initial_balance):
>         self.balance = initial_balance
>     def deposit(self, amount):
>         self.balance +=amount
>     def withdraw(self, amount):
>           if self.balance>= amount:
>               self.balance  -=  amount
>           else:
>             return invalid transaction
> a1 = BankAccount (90)
> a1.deposit(90)
> a1.withdraw(40)
> a1.withdraw(1000)
> class MinimumBalanceAccount(BankAccount):
>   def __init__(self):
>     BankAccount.__init__(self,minimum_balance)
>     self.minimum_balance = minimum_balance
>     my_account = BankAccount(90)
>     my_account.withdraw(40)
>     print my_account.balance
>
>
> It keeps alerting me that,"Error running your script".Where might I have  
> gone wrong?Please help..

Most probably there's extra information available on the "Error running  
your script" message. You should examine that.
Meanwhile, I think the line "return invalid transaction" provides a clue.

-- 
Vriendelijke groeten / Kind regards,

Albert Visser

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