correct solution notethe above problem can be resolved by creating local copy of perimeter in the class in this waythe child class method can not override the local-copy of parent class method for thiswe need to modify the code as below pythonic py import math import time 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 "" class variables date time strftime("% -% -% "time gmtime()today' date "yyyy-mm-ddcenter center of the ring def __init__(selfdate=datemetal="copper"radius= price= quantity= )""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 self radiusself metal etc are the instance variable which must be unique "" self date date self metal metal self radius radius self price price self quantity quantity multiple constructor below constructor is added for the 'research organizationwho are doing their work based on diameters@classmethod def diameter_init(clsdiameter)radius diameter/ change diameter to radius return cls(radiusreturn radius @staticmethod meter to centimeter conversion def meter_cm(meter)return( *meter def cost(self)(continues on next page micro-managing