In this exercise, you will get some practice with the __add__ method by implementing it for a class called ContactBook. This class represents a collection of names and phone numbers. ContactBook stores its information as a dictionary, where the key is a name and the value is a phone number or group of phone numbers. The keys and values in this dictionary are stored as strings. When printed, a ContactBook might look like this:

Answer:

class ContactBook():

   def __init__(self):

       self.contacts ={}

   def __repr__(self):

       return str(self.contacts)

   def add_contact(self,name,number):

       self.contacts[name] = number

   def __add__(self, other):

       new_contact = ContactBook()

       other_contact = other.contacts.keys()

       for name,num in self.contacts.items():

           if name in other_contact:

               new_contact.add_contact(name,num or other_contact[name])

           else:

               new_contact.add_contact(name,num)

       for name,num in other.contacts.items():

           if name not in self.contacts:

               new_contact.add_contact(name, num)

       return new_contact-

cb1 = ContactBook()

cb2 = ContactBook()

cb1.add_contact('Jonathan','444-555-6666')

cb1.add_contact('Puneet','333-555-7777')

cb2.add_contact('Jonathan','222-555-8888')

cb2.add_contact('Lisa','111-555-9999')

print(cb1)

print(cb2)

cb3 = cb1+cb2

print(cb3)

Explanation:

The ContactBook class holds the contact details of an instance of the class. The class has three magic methods the '__repr__', '__init__', and the '__add__' which is the focus of the code. The add magic method in the class adds the contact book (dictionary) of two added object instance and returns a new class with the contact details of both operand instances which is denoted as self and other.

-(-13) P binary using signed. 2's complement representation
Perform the arithmetic operations (+42) + (-13) and (-42)
negative .
Consider the balloon​

Consider the following method, which is intended to return an array of integers that contains the elements of the parameter arr arranged in reverse order. For example array containing (-5, 3, 2, 7) then a new array (-5, 3, 2, 7) contains should be returned and the parameter are should be left unchanged .

public static int[] reverse(int) arr)
Intl new new intarr.length);
for (int k = 0; K arr.length: )
* Bissing statement / return newer;

Write down the statements that can be used to replace / Missing statement so that the method works as intended?

Write a program with total change amount as an integer input, and output the change using the fewest coins, one coin type per line. The coin types are Dollars, Quarters, Dimes, Nickels, and Pennies. Use singular and plural coin names as appropriate, like 1 Penny vs. 2 Pennies.
If input is 0 or less, output is 'No Change'
For Example: Input: 45
Output:
1 Quarter
2 Dimes
input_val = int(input())
if input_val <= 0:
print('No change')
else:
num_dollars == input_val // 100
input_val %= 100
num_quarters == input_val // 25
input_val %= 25
num_dimes == input_val // 10
input_val %= 10
num_nickels == input_val // 5
input_val %= 5
num_pennies == input_val
if num_dollars > 1:
print('%d dollars' % num_dollars)
elif num_dollars ==1:
print('%d dollar' % num_dollars)
if num_quarters > 1:
print('%d quarters' % num_quarters)
elif num_quarters ==1:
print('%d quarter' % num_quarters)
if num_dimes >1:
print('%d dimes' % num_dimes)
elif num_dimes ==1:
print('%d dime' % num_dimes)
if num_nickels >1:
print('%d nickels' % num_nickels)
elif num_nickels ==1:
print('%d nickel' % num_nickels)
if num_pennies >1:
print('%d pennies' % num_pennies)
elif num_pennies ==1:
print('%d penny' % num_pennies)

Question # 2 Multiple Choice The _____ method returns an integer between the two provided numbers. It can take the value of either of the provided numbers. seed randint random range