Merge pull request #8161 from Gordo-Master/#23-Python

#23-Python

Author: Roswell468

Roadmap/23 - SINGLETON/python/Gordo-Master.py

@@ -0,0 +1,77 @@
+# Singleton
+
+# Patron de diseño, donde la clase solo genera una instancia, que es unica y tenga un punto acceso global 
+
+"""
+Sirve para:
+1- Gestión de configuración
+2- Conexión a base de datos
+3- Registro de logs
+4- Controladores de cache
+"""
+
+class Singleton:
+    _instance = None
+
+    def __new__(cls):
+        if cls._instance is None:
+            cls._instance = super(Singleton, cls).__new__(cls)
+        return cls._instance
+    
+
+obj_1 = Singleton()
+obj_2 = Singleton()
+
+print(obj_1 is obj_2)
+
+
+"""
+Ejercicio extra
+"""
+
+class UserSession:
+    _instance = None
+
+    def __new__(cls):
+        if cls._instance is None:
+            cls._instance = super(UserSession, cls).__new__(cls)
+            cls._instance.init_data()
+        return cls._instance
+    
+    def init_data(self):
+        self._id = None
+        self.user_name = None
+        self._name = None
+        self.email = None
+    
+    def set(self, _id, user_name, _name, email):
+        self._id = _id
+        self.user_name = user_name
+        self._name = _name
+        self.email = email
+
+    def get_data(self):
+        print("Datos del usuario: ")
+        print(f"Id: {self._id}")
+        print(f"User name: {self.user_name}")
+        print(f"Name: {self._name}")
+        print(f"Email: {self.email}")
+
+    def close_session(cls):
+        print("Cerrando sesión...")
+        cls.init_data()
+
+sesion1 = UserSession()
+sesion1.set("01","Gordo-Master","Gordo","gordomaster@gmail.com")
+sesion1.get_data()
+
+print("Prueba con otro")
+sesion2 = UserSession()
+sesion2.get_data()
+
+sesion1.close_session()
+sesion1.get_data()
+print(sesion1)
+
+
+