How to create an empty class in Python?

A class in Python is a user-defined prototype for an object that defines a set of attributes that characterize any object of the class. The attributes are data members (class variables and instance variables) and methods, accessed via dot notation.

We can easily create an empty class in Python using the pass statement. This statement in Python does nothing and acts as a placeholder ?

Basic Empty Class Syntax

Here's how to create a simple empty class ?

class Student:
    pass

print("Empty class created successfully!")

Empty class created successfully!

Creating Objects from Empty Class

We can create objects of an empty class and use them in our program ?

class Student:
    pass

# Creating objects
obj1 = Student()
obj2 = Student()

# Displaying object references
print("Object 1:", obj1)
print("Object 2:", obj2)
print("Are they the same object?", obj1 is obj2)

Object 1: <__main__.Student object at 0x7f06660cba90>
Object 2: <__main__.Student object at 0x7f06660cb550>
Are they the same object? False

Adding Dynamic Attributes

Empty classes are flexible ? you can add attributes to objects dynamically after creation ?

class Student:
    pass

# Creating objects and adding attributes
st1 = Student()
st1.name = 'Henry'
st1.age = 17
st1.marks = 90

st2 = Student()
st2.name = 'Clark'
st2.age = 16
st2.marks = 77
st2.phone = '120-6756-79'

print('Student 1:', st1.name, st1.age, st1.marks)
print('Student 2:', st2.name, st2.age, st2.marks, st2.phone)

Student 1: Henry 17 90
Student 2: Clark 16 77 120-6756-79

Other Uses of pass Statement

Empty Function

The pass statement can create empty functions for placeholder purposes ?

def calculate_grade():
    pass

def send_notification():
    pass

print("Empty functions defined successfully!")

Empty functions defined successfully!

Empty Control Structures

Use pass in empty conditional statements and loops ?

# Empty if-else
status = True
if status:
    pass  # TODO: Add implementation later
else:
    print("Status is False")

# Empty for loop
items = [1, 2, 3]
for item in items:
    pass  # Placeholder for future logic

print("Empty control structures created!")

Empty control structures created!

When to Use Empty Classes

Empty classes are useful for:

• Prototyping: Creating class structure before implementing methods
• Data containers: Simple objects to hold related data
• Placeholders: Temporary classes during development
• Namespace objects: Grouping related functions or constants

Conclusion

Empty classes in Python use the pass statement as a placeholder. They allow dynamic attribute assignment and serve as useful prototypes during development. The pass statement also works for empty functions and control structures.