Abstract & Static Level 2 |Assignment Set-5|Object Oriented Programming Using Python|NM|Infosys

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Assignment on Abstract & Static - Level 2
Problem Statement
Spice Hut is a tiffin service provider which home delivers dinner to their customers – Occasional customers and Regular customers.
Write a Python program to implement class diagram given below.



Class Description:

OccasionalCustomer class:

Initialize static variable counter to 1000
Inside the constructor, auto-generate bill_id starting from 1001 prefixed by "O"
validate_distance_in_kms(): Validate distance in kms
Delivery distance in kms should be between 1 and 5 (both inclusive)
If so, return true. Else, return false
Distance in kms

Delivery charge in Rs.

Between 1 and 2(both inclusive)

Rs. 5 per km

Between 2 and 5(excluding 2,including 5)

Rs. 7.5 per km

4. calculate_bill_amount(): Calculate total bill amount

Validate distance in kms

If valid, compute bill amount based on details mentioned below

Occasional customers can order only one tiffin per person

Cost/tiffin is Rs. 50

Delivery charges based on distance is as mentioned in the table

Bill amount includes tiffin cost and delivery charge

Set attribute, bill_amount with the computed bill amount value and return it

If invalid, set attribute, bill_amount as -1 and return it

RegularCustomer class:

Initialize static variable counter to 100
Inside the constructor, auto-generate bill_id starting from 101 prefixed by "R"
validate_no_of_tiffin(): Validate number of tiffins
Regular customer can order a min of 1 and a max of 7 tiffins
If value of no_of_tiffins is valid, return true. Else, return false
calculate_bill_amount(): Calculate weekly bill amount
Validate number of tiffins
If valid, compute bill amount based on details mentioned below
Cost/tiffin is Rs. 50
The order is applicable for all the 7 days of a week
Compute the bill amount based on cost/tiffin, number of tiffins and number of days
Set attribute, bill_amount with the computed bill amount value and return it
If invalid, set attribute, bill_amount as -1 and return it
Note: Perform case sensitive string comparison

For testing:

Create objects of OccasionalCustomer and RegularCustomer classes
Invoke calculate_bill_amount() on OccasionalCustomer and RegularCustomer objects
Display the details of the customer
Code in Python 3

[answersdotcom-bglx]

from abc import ABCMeta, abstractmethod

class Customer(metaclass=ABCMeta):
def __init__(self, customer_name):
self.__customer_name = customer_name
self.bill_amount = None
self.bill_id = None

@abstractmethod
def calculate_bill_amount(self):
pass

def get_customer_name(self):
return self.__customer_name


class
__counter = 1000

def __init__(self, customer_name, distance_in_kms):

self.__distance_in_kms = distance_in_kms
OccasionalCustomer.__counter += 1
self.bill_id = "O" +

def
return 1 <= self.__distance_in_kms <= 5

def calculate_bill_amount(self):
if
if self.__distance_in_kms < 3:
self.bill_amount = 50 + self.__distance_in_kms * 5
else:
self.bill_amount = 50 + self.__distance_in_kms * 7.5
else:
self.bill_amount = -1
return self.bill_amount

def get_distance_in_kms(self):
return self.__distance_in_kms


class RegularCustomer(Customer):
__counter = 100

def __init__(self, customer_name, no_of_tiffin):

self.__no_of_tiffin = no_of_tiffin
RegularCustomer.__counter += 1
self.bill_id = "R" +

def validate_no_of_tiffin(self):
return 1 <= self.__no_of_tiffin <= 7

def calculate_bill_amount(self):
if
self.bill_amount = 50 * self.__no_of_tiffin * 7
else:
self.bill_amount = -1
return self.bill_amount

def get_no_of_tiffin(self):
return self.__no_of_tiffin


# Test the OccasionalCustomer class to see if the bill_id is generated correctly
for _ in range(5):
occasional_customer = OccasionalCustomer("John Doe", 4)

print(f"Bill ID: {occasional_customer.bill_id}, Bill Amount:

# Test the RegularCustomer class to see if the bill_id is generated correctly
regular_customer = RegularCustomer("Jane Doe", 3)

print(f"Bill ID: {regular_customer.bill_id}, Bill Amount: