utils module was added

Author: ProgrammingLanguageLeader

utils/__init__.py

@@ -0,0 +1,9 @@
+class Singleton:
+    def __init__(self, klass):
+        self.klass = klass
+        self.instance = None
+
+    def __call__(self, *args, **kwargs):
+        if not self.instance:
+            self.instance = self.klass(*args, **kwargs)
+        return self.instance