From 0257c034bab2f8c9b660d1c31b141f2edc072403 Mon Sep 17 00:00:00 2001
From: Pavan <pavan.mt9@gmail.com>
Date: Tue, 26 Oct 2021 21:04:36 +0530
Subject: [PATCH] Create learn_singleton.py

---
 .../Python_Programs/learn_singleton.py        | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 Program's_Contributed_By_Contributors/Python_Programs/learn_singleton.py

diff --git a/Program's_Contributed_By_Contributors/Python_Programs/learn_singleton.py b/Program's_Contributed_By_Contributors/Python_Programs/learn_singleton.py
new file mode 100644
index 0000000000..9fffaaf3b8
--- /dev/null
+++ b/Program's_Contributed_By_Contributors/Python_Programs/learn_singleton.py
@@ -0,0 +1,30 @@
+def singleton(class_):
+    instances = {}
+    def getinstance(*args, **kwargs):
+        if class_ not in instances:
+            instances[class_] = class_(*args, **kwargs)
+        return instances[class_]
+    return getinstance
+
+@singleton
+class Test1(object):
+    def __init__(self):
+        self.var_1 = "bob"
+
+    def change_var(self, new_var):
+        print(self.var_1) #should print "bob"
+        self.var_1 = new_var #should change "bob" to "john"
+        print(self.var_1) #should print "john"
+
+class Test2(object):
+    def __init__(self):
+        test1 = Test1()
+        test1.change_var("john")
+
+class Test3(object):
+ def __init__(self):
+   test1 = Test1()
+   print(test1.var_1)
+
+Test2()
+Test3()