Code Explanation:
1. Class Definition
class Data:
You define a class named Data.
A class is a blueprint for creating objects that can hold data and behavior.
2. Constructor (__init__)
def __init__(self, v):
self.v = v
__init__ is the constructor that runs when a new Data object is created.
It accepts a parameter v and assigns it to the instance attribute self.v.
After this, every Data instance stores its value in v.
3. __repr__ Magic Method
def __repr__(self):
return f"<<{self.v}>>"
__repr__ is a special (magic) method that returns the “official” string representation of the object.
When you inspect the object in the REPL or use print() (if __str__ is not defined), Python will use __repr__.
This implementation returns a formatted string <<value>>, inserting the instance’s v value into the template.
4. Creating an Instance
d = Data(8)
This creates an instance d of class Data with v = 8.
The constructor stores 8 in d.v.
5. Printing the Object
print(d)
print(d) tries to convert d to a string. Because Data defines __repr__ (and no __str__), Python uses __repr__.
The __repr__ method returns the string "<<8>>", which print outputs.
Final Output
<<8>>
.png)
.png)
Posts
0 Comments:
Post a Comment