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``````# Defines two classes, Point() and Triangle().
# An object for the second class is created by passing named arguments,
# point_1, point_2 and point_3, to its constructor.
# Such an object can be modified by changing one point, two or three points
# thanks to the function change_point_or_points().
# At any stage, the object maintains correct values
# for perimeter and area.
#
# Written by *** and Eric Martin for COMP9021

from math import sqrt

class Point():
def __init__(self, x = None, y = None):
if x == None and y == None:
self.x = 0
self.y = 0
elif x == None or y == None:
print('Need two coordinates, point not created.')
else:
self.x = x
self.y = y

# Write code for a function named collinear

class Triangle:
def __init__(self, *, point_1, point_2, point_3):
if point_1.collinear(point_2, point_3):
self.error_message('Initialisation')
else:
self._initialise(point_1, point_2, point_3)

def error_message(self, phase):
if phase == 'Initialisation':
print('Incorrect input, triangle not created.')
else:
print('Incorrect input, triangle not motified.')

def change_point_or_points(self, *, point_1 = None,
point_2 = None,
point_3 = None):
pass
# Replace pass above with your code

def _initialise(self, p1, p2, p3):
pass
# Replace pass above with your code
=
# Possibly define other functions

``````

Resource created Wednesday 09 September 2015, 11:59:15 PM.

file: quiz_6.py