object oriented programming pythonic style in this we will see the basic differences between the oops methods in python and other programming languages +and java etc this understanding is essential to use the python language effectivelyand to write the code in pythonic waysi not converting ++/java code into python code here we will see the actual logic behind various pieces of python language instancesvariablesmethod and @property etc alsowe will see the combine usage of these pieces to complete design with agile methodology simple data structure to classes in this sectionwe will convert our previous codes into classes instance variable first create classwhich can contain various columns of the csv file as shown in the below code please note the following points__init__ is the initializer (often called the constructor)which initializes the instance variables self radiusself date and self metal are the instance variables which are created by the __init__ pythonic py import math class ring(object)""here we will see the actual logic behind various pieces of python language instancesvariablesmethod and @property etc alsowe will see the combine usage of these pieces to complete design with agile methodology ""def __init__(selfdatemetalradiuspricequantity)""init is not the constructorbut the initializer which initialize the instance variable self is the instance __init__ takes the instance 'selfand populates it with the radiusmetaldate etc and store in dictionary (continues on next page