This is a project that defines basic OOP principles.

On your terminal run the following

git clone https://github.com/andela-gathondu/Bank-Account.git

You should have python installed in your machine. If you dont have python installed go to this link Installing Python.

You should also have an editor installed, if not follow this link Installing sublime.

1. Open the directory where you have the project cloned.

2. The principles are as follows:

   • Class

     This depicts real life objects, more specifically nouns. e.g Class Bank(object):

   • Object

     This is described as an instance of a Class

   • Functions

     When a block of code that run together to perform a specific task are combined, they are reffered to as a Function. When this block of code is inside a class it's reffered to as a Method instead and define the behaviour of the Class.

     In bank.py, def deposit(self, amnt): is a method

   • Polymorphism

     This is when one method from a class is inherited by different classes and the method performs different tasks as defined by the inheriting method e.g in bank.py we have the deposit and withdraw methods being impelemneted differently.

   • Inheritance

     This is when a class aquires the attributes and properties of another class and in python this is achieved by stating which class to aquire from, the properties and attributes. In the bank.py we can see that CurrentAccount inherits from Bank using parenthesis as follows:

     class CurrentAccount(Bank):

   • Encapsulation

     This means hiding implementation from the user. User should only know how to interact with a class but it's implementation is hidden. Its can be described as abstraction too. In the bank.py we have the CurrentAccount class that has an attribute __minimalBalance.

     class CurrentAccount(Bank):
          def __init__(self):
              self.__minimalBalance = 500
              self.amount = self.__minimalBalance

     but this attribute is known to the class alone and trying to access it raises an AttributeError as shown below:

     

• visual studio code
• python 3.6