Question

Write code on best Python style and with appropriate indentation.

1. Given that you have function f that accepts a kwargs argument and does not have a return. You also have a variable d that has been assigned a dictionary. Write a line of code that passes variable d to function f.

2a) Complete the following code to build the states dictionary. The USPresidents.txt file has a number of lines of data, with each line containing two pieces of data: a two letter state abbreviation and the name of a president born in that state. The dictionary keys should be the state abbreviation and the dictionary values should be a count of how many presidents were born in that state (this is just like one of your lab exercises). Only build the one dictionary – don’t build any lists, etc. State = {} File = open(USPresidents.txt”,”r”) For line in file:

2b) Iterate through the states dictionary to print the key and value for each item in the dictionary.

3a) Write a complete Square class. It should have an __init__ method and a getArea method. The __init__ method should accept side (the length of the side of the squre) as a parameter. 3b) Write a complete Cube class. It should inherit from the Square class and should have an __init__ method and a getVolume mehod. The __init__ method should accept side as a parameter.

3c) Initialize variable S with a square object with a side of 3.

3d) Print the area of square 9.

3e) Initialize variable c with a cube object with a side of 4.

3f) Print the volume of cube C.

4a) Given that you have a Liquid class that can be initialized with any amount of gallons, liters, ounces, etc, write the first line of the method that will allow you to add together two Liquid objects using operator overloading. Again, write ONLY the first line ( method definition) – you do NOT have to write the entire method.

4b) Given that you have L1 and L2 which are instances of the Liquid class, write a line of code that uses operator overloading to add them together and assign the result to L3.

5) Write a function called calcTotal. It should have a required parameter called price and an optional parameter called lowRate with a default value of 0.08. The function should return the price including the calculated tax.

Answer 1

Please find the python program:

Answer 1:

#function uses key worded args
def kwargsFun(**kwargs):
    for key, value in kwargs.items():
        print ("%s == %s" %(key, value))

d={"1": "one", "2": "two", "3": "three" }

kwargsFun(**d)

Output:

3 == three
2 == two
1 == one

Answer 2:

State={}
File=open("USPresidents.txt","r")
for line in File:
   a=line.split(" ")
   if a[0] not in State:
      State[a[0]] = 1
   else:
      State[a[0]]=State[a[0]] + 1

for key,val in State.items():
    print key, "=>", val

Output:

BT => 1
ST => 2

Answer 3a-f:

class square():
    def __init__(self,length):
        self.area=length
    def getArea(self):
        return self.area**2
   
class cube(square):
    def __init__(self, side):
        super().__init__(length = side)
        self.side=side
    def getVolume(self):
        return super().getArea() * self.side
       
       
       
   
   

S=square(3);
print("area of a square is", S.getArea())

V=cube(4);
print("Volume of a cube is", V.getVolume())

Output:

area of a square is 9
Volume of a cube is 64

Answer 4a, 4b:

class liquid:
    def __init__(self, liters, gallons, ounces):
        self.a = liters
        self.b = gallons
        self.c = ounces

     # adding two objects
    def __add__(self, other):
        self.a=self.a + other.a
        self.b=self.b + other.b
        self.c=self.c + other.c
        return self

   
L1 = liquid(4,5,6)
L2 = liquid(7,8,1)

L3 = L1 + L2

print("liters is ", L3.a)
print("gallons is ",L3.b)
print("ounces is ",L3.c)

Output:

liters is 11
gallons is 13
ounces is 7

ANswer 5:

def calcTotal(price, lowRate=0.8):
    return price+lowRate
   
   
print("Opitonal argument not specified", calcTotal(10))

print("Opitonal argument specified ", calcTotal(10, 20))
   

Output:

Opitonal argument not specified 10.8
Opitonal argument specified 30

Screen SHot for all program: