What is a singleton pattern? code example

Example 1: singleton pattern

class Singleton:
    __instance = None
    def __new__(cls, *args):
        if cls.__instance is None:
            cls.__instance = object.__new__(cls, *args)
        return cls.__instance

Example 2: singelton code

using UnityEngine;

public class SingeltonObject : MonoBehaviour
{

    void Awake()
    {
        SetUpSingelton();   
    }

    private void SetUpSingelton()
    {
        if (FindObjectsOfType(GetType()).Length > 1)
        {
            Destroy(gameObject);
        }
        else
        {
            DontDestroyOnLoad(gameObject);
        }
    }
}