Python Coding challenge - Day 1199| What is the output of the following Python Code?

 

Code:

from abc import ABC, abstractmethod class Test(ABC): @abstractmethod def show(self): pass obj = Test()

 

Explanation:

🔹 1. Importing ABC and abstractmethod

from abc import ABC, abstractmethod

✅ Explanation

Python imports two special objects from the abc (Abstract Base Class) module.

ABC is used to create an Abstract Base Class.

@abstractmethod is used to declare methods that must be implemented by child classes.

Think of it like an architect's blueprint.

Architect Blueprint

↓

Must have:

✔ Door

✔ Window

✔ Roof

You cannot live inside a blueprint.

Similarly,

ABC

↓

Defines rules

↓

Cannot be used directly

🔹 2. Creating an Abstract Class

class Test(ABC):

✅ Explanation

Here, Test inherits from ABC.

This tells Python:

"This is not a normal class.

This is an Abstract Class."

Visual:

ABC

 │

 ▼

Test

(Abstract Class)

Unlike a normal class, this class is meant to be inherited, not instantiated.

🔹 3. Using @abstractmethod

@abstractmethod

✅ Explanation

This decorator marks the next method as abstract.

Meaning:

Every child class

MUST

implement this method.

It is like creating a rule.

Example:

School Rule

Every student

must submit homework.

Similarly,

Every child class

must implement show()

🔹 4. Defining the Abstract Method

def show(self):

✅ Explanation

A method named show() is declared.

But notice...

It has no implementation.

It only defines:

Method name

Parameters

Actual logic will be written by child classes.

Visual:

show()

↓

Only Declaration

↓

No Code Yet

🔹 5. Using pass

pass

✅ Explanation

pass means:

"Do nothing."

Python requires every function to have a body.

Since the method is abstract, we leave it empty using pass.

Equivalent idea:

Coming Soon...

No implementation yet.

🔹 6. Current Class Structure

At this point, Python has created:

Test

│

└── show()

(Abstract Method)

Notice:

show()

↓

No implementation

Therefore the class is incomplete.

🔹 7. Creating an Object

obj = Test()

✅ Explanation

Python now tries to create an object.

Internally:

Create Object

↓

Check Class

↓

Does it contain abstract methods?

↓

YES

Python immediately stops.

🔹 8. Why Does Python Raise an Error?

Because Test still has an abstract method.

Python says:

You promised that

show()

would be implemented,

but it isn't.

So object creation is not allowed.

❌ Error Produced

TypeError:

Can't instantiate abstract class Test

with abstract method show

🎯 Final Output

TypeError:

Can't instantiate abstract class Test

with abstract method show