Code Explanation:
1. Creating a Class
class Wallet:
- Defines a class named Wallet.
- A class acts as a blueprint for creating objects.
- Here, the class represents a wallet containing some amount of cash.
2. Defining the Constructor
def __init__(self, cash):
- Defines the special method __init__().
- It is automatically called when a new Wallet object is created.
- The cash parameter receives the initial amount.
- self refers to the current object.
3. Storing the Cash Value
self.cash = cash
- Assigns the received cash value to the object's cash attribute.
- Each wallet object maintains its own cash amount.
- For example, one wallet can contain 50 while another contains 70.
4. Defining the Addition Method
def __add__(self, other):
- Defines the special method __add__().
- Python internally calls this method when the + operator is used between two Wallet objects.
- self represents the left-hand object.
- other represents the right-hand object.
For example:
a + b internally behaves like:
a.__add__(b)
5. Returning the Addition Result
return self.cash + other.cash
- Retrieves the cash value from the first wallet using self.cash.
- Retrieves the cash value from the second wallet using other.cash.
- Adds both values together.
- Returns the calculated result.
6. Creating the First Object
a = Wallet(50)
- Creates an object named a.
- Calls the constructor with cash = 50.
- Stores 50 in a.cash.
7. Creating the Second Object
b = Wallet(70)
- Creates another object named b.
- Passes 70 to the constructor.
- Stores 70 in b.cash.
8. Using the Addition Operator
print(a + b)
- Uses the + operator between two Wallet objects.
- Python automatically calls a.__add__(b).
- The method calculates 50 + 70.
- The returned integer value is 120.
- Finally, print() displays the result.
Final Output
Correct Output
120
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