Need help to understand not the answer
new_to_c0ding
devinderaujla at gmail.com
Sat Jul 29 15:16:10 EDT 2017
Hello all,
I have been scratching my head since morning but could not understand this quiz question. I would appreciate if someone could help me understand what is it asking me to do. I dont need the answer but just the right direction to look at.
### Do not change the Location or Campus classes. ###
### Location class is the same as in lecture. ###
class Location(object):
def __init__(self, x, y):
self.x = x
self.y = y
def move(self, deltaX, deltaY):
return Location(self.x + deltaX, self.y + deltaY)
def getX(self):
return self.x
def getY(self):
return self.y
def dist_from(self, other):
xDist = self.x - other.x
yDist = self.y - other.y
return (xDist**2 + yDist**2)**0.5
def __eq__(self, other):
return (self.x == other.x and self.y == other.y)
def __str__(self):
return '<' + str(self.x) + ',' + str(self.y) + '>'
class Campus(object):
def __init__(self, center_loc):
self.center_loc = center_loc
def __str__(self):
return str(self.center_loc)
class MITCampus(Campus):
""" A MITCampus is a Campus that contains tents """
def __init__(self, center_loc, tent_loc = Location(0,0)):
""" Assumes center_loc and tent_loc are Location objects
Initializes a new Campus centered at location center_loc
with a tent at location tent_loc """
# Your code here
def add_tent(self, new_tent_loc):
""" Assumes new_tent_loc is a Location
Adds new_tent_loc to the campus only if the tent is at least 0.5 distance
away from all other tents already there. Campus is unchanged otherwise.
Returns True if it could add the tent, False otherwise. """
# Your code here
def remove_tent(self, tent_loc):
""" Assumes tent_loc is a Location
Removes tent_loc from the campus.
Raises a ValueError if there is not a tent at tent_loc.
Does not return anything """
# Your code here
def get_tents(self):
""" Returns a list of all tents on the campus. The list should contain
the string representation of the Location of a tent. The list should
be sorted by the x coordinate of the location. """
# Your code here
-=-=-=-=-=-=-=
For example, if c = MITCampus(Location(1,2)) then executing the following sequence of commands:
c.add_tent(Location(2,3)) should return True
c.add_tent(Location(1,2)) should return True
c.add_tent(Location(0,0)) should return False
c.add_tent(Location(2,3)) should return False
c.get_tents() should return ['<0,0>', '<1,2>', '<2,3>']
-=-=-=-=-=-=-
Now as per instructions, class MITCampus(Campus) has (self, center_loc, tent_loc = Location(0,0)) and it is mentioned that center_loc and tent_loc are Location objects but when I code them as Locations, I get error from the tester:
Traceback (most recent call last):
File "submission.py", line 61, in __init__
self.cloc=Location(center_loc)
TypeError: __init__() missing 1 required positional argument: 'y'
-=-=-=-==
Please help
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