Singleton Pattern in Video Series

The Singleton pattern is a design pattern that ensures a class has only one instance and provides a global point of access to it. This pattern is often used when exactly one object is needed to coordinate actions across the system.

Here are some key points about the Singleton pattern:

• Ensure a class only has one instance: This can be achieved by making the constructor private and providing a static method that returns the instance.
• Provide a global point of access to the instance: This can be done by providing a static method that returns the instance.
• Singleton instances are often used for managing resources: For example, a database connection or a logging system.

How to Implement Singleton Pattern

Here's a simple implementation of the Singleton pattern in Python:

class Singleton:
    _instance = None

    def __new__(cls):
        if cls._instance is None:
            cls._instance = super(Singleton, cls).__new__(cls)
        return cls._instance

Benefits of Singleton Pattern

• Reduced resource consumption: Since only one instance of the class is created, it reduces the memory footprint.
• Easier to manage: It's easier to manage a single instance than multiple instances.
• Increased performance: Accessing a single instance is faster than accessing multiple instances.

Related Videos

For more information on design patterns, check out our Design Patterns series.

Singleton Pattern