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QUIZ 7 COMP9021 PRINCIPLES OF PROGRAMMING $ python3 ... >>> from quiz_7 import * >>> disk_1 = Disk() >>> disk_1 Disk(Point(0.00, 0.00), 0.00) >>> disk_1.area 0.0 >>> disk_2 = Disk(Point(3, 0), 4)...

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QUIZ 7
COMP9021 PRINCIPLES OF PROGRAMMING
$ python3
...
from quiz_7 import *
disk_1 = Disk()
disk_1
Disk(Point(0.00, 0.00), 0.00)
disk_1.area
0.0
disk_2 = Disk(Point(3, 0), 4)
Traceback (most recent call last):
File "", line 1, in TypeE
or: __init__() takes 1 positional argument but 3 were given
disk_2 = Disk(centre = Point(3, 0), radius = 4)
disk_2.area
XXXXXXXXXX
disk_1.intersects(disk_2)
True
disk_2.intersects(disk_1)
True
disk_3 = disk_1.abso
(disk_2)
disk_3
Disk(Point(3.00, 0.00), 4.00)
disk_1.change_radius(2)
disk_1.area
XXXXXXXXXX
disk_3 = disk_1.abso
(disk_2)
disk_1
Disk(Point(0.00, 0.00), 2.00)
disk_2
Disk(Point(3.00, 0.00), 4.00)
disk_3
Disk(Point(2.50, 0.00), 4.50)
disk_4 = Disk(centre = Point(-4, 0), radius = 2)
disk_4.intersects(disk_1)
True
Date: Session 2, 2018.
2 COMP9021 PRINCIPLES OF PROGRAMMING
disk_5 = disk_4.abso
(disk_1)
disk_5
Disk(Point(-2.00, 0.00), 4.00)
disk_5.change_radius(5)
disk_5
Disk(Point(-2.00, 0.00), 5.00)
disk_6 = Disk(centre = Point(1, 2), radius = 6)
disk_7 = disk_5.abso
(disk_6)
disk_7
Disk(Point(-0.08, 1.28), 7.30)
disk_7.area
XXXXXXXXXX
disk_8 = Disk()
disk_8
Disk(Point(0.00, 0.00), 0.00)
disk_8.change_radius(7)
disk_8.abso
(disk_7)
Disk(Point(-0.05, 0.79), 7.79)
Answered Same Day Sep 15, 2020 COMP9021

Solution

Snehil answered on Sep 17 2020
138 Votes
quiz_7.py
# Defines two classes, Point() and Disk().
# The latter has an "area" attribute and three methods:
# - change_radius(r)
# - intersects(disk), that returns True or False depending on whethe
# the disk provided as argument intersects the disk object.
# - abso
(disk), that returns a new disk object that represents the smallest
# disk that contains both the disk provided as argument and the disk object.
#
# Written by *** and Eric Martin for COMP9021
from math import pi, hypot
#Class to represent a point with x and y values
class Point:
#constructor for the point, initializing to 0,0
def __init__(self, x = 0, y = 0):
self.x = x
self.y = y

#Method to represent point as a string value
def __repr__(self):
return f'Point({self.x:.2f}, {self.y:.2f})'
#Class to represent a disk with a centre point and a radius value
class Disk:

#constructor for the Disk, initializing to the given arguments in the keword argument dictionary
def __init__(self, **kwargs):
self.centre = Point(0,0)
self.radius = 0
if 'centre' in kwargs: # if centre argument is provided
self.centre = kwargs.get('centre')
if 'radius' in kwargs:# if radius argument it provided
self.radius = kwargs.get('radius')
self.area = pi *...
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