quiz

Chapter 7 OOP Quiz

Please read the note carefully and try to solve the problem below:

Quiz Q0701

Create a class named Person and add the following attributes and methods:

• name str: Instance attribute
• age int: Instance attribute
• gender bool: Instance attribute
• weight float: Class attribute
• year_of_birth(): Returns the year by subtracting the age from the current year.
• get_pronouns(): Returns list of ['he', 'his', 'him'] or ['she', 'her', 'hers'] by checking the gender

The initializer method should take parameters: name, age, and gender

Quiz Q0702

Create a class Item with the following properties

• name: str
• rate: float
• quantity: float

Create a class Bill with the following properties

• customer_name: str
• items: List[Item]
• count_items():
  • counts the total number of items in the bill
• total():
  • finds out the total price of the items in the bill
  • returns the grand total as a floating point number
• print_invoice():
  • prints out the bill in the format as shown below.

Example: we have items as follows:

• rice: 5 kg $2.4 per Kg
• apple: 1 kg $1.0 per Kg
• notebook: 3 items $1.5 per item

+------------------------------------------------------------+
|                          ABC Shop                          |
|............................................................|
|  Order Invoice for: John Doe                               |
|............................................................|
|  SN  name                        rate  Quantity     total  |
|   1  rice                         2.4       5.0      12.0  |
|   2  apple                        1.0       1.0       1.0  |
|   3  notebook                     1.5       3.0       4.5  |
|............................................................|
|                               Grand Total          $ 17.5  |
|............................................................|
|              Thank you for visiting ABC Shop               |
+------------------------------------------------------------+

Guide for creating the table:

• Outer Borders should be created with '-', '+', and '|' characters
• inner borders should be created with '.' character
• total width of bill: 60 excluding borders
• Grand Total should have the width of the bill and should be justified right
• headers and footers should be justified center
• you can call function print_item_row() to print each item in the row. you can change the function itself to print in your own format.

hints:

print('+', '-' * 60, '+', sep='')
print('|', 'ABC Shop'.center(60), '|', sep='')
print('|', '.' * 60, '|', sep='')
print('|', '  Order Invoice for: John Doe'.ljust(60), '|', sep='')
print('|', '.' * 60, '|', sep='')

Solution:

# answer
def print_item_row(sn, name, rate, quantity):
    # add bill header here

    # add customer name here

    # titles for table
    print(f'|  {sn: 2d}  {name.ljust(22)}  {rate: 8.1f}  {quantity: 8.1f}  {rate*quantity: 8.1f}  |')

    # print all items in rows here

    # print grand total here

    # print footer here


class Item:
    pass  # your code here


class Bill:
    # attributes

    # methods

    def print_invoice(self):
        print(f"|  SN  {'name'.ljust(22)}  {'rate'.rjust(8)}  Quantity  {'total'.rjust(8)}  |")
        # your code here

Quiz Q0703

Create a class Vehicle add some attributes and methods to it

• name
• brand
• wheels_count
• engine_type
• braking_system

Create a child class HeavyVehicle and inherit all the attributes from the parent class Vehicle - change the wheels_count from 4 to 6 in the initializer or accept the value while instantiating - add more instance attributes like max_load, mileage, etc.

Create a child class Bike and inherit all the attributes from the parent class Vehicle

• change the wheels_count from 4 to 2 in the initializer
• add setter or getter methods to add bike number, and owner name
• try adding property instead of setter or getter for passenger/ pillion attribute

create different instances of Vehicle, HeavyVehicle, and Bike and check whether each other are subclasses and instances of different classes or not. """