Added Singleton class to inherit as needed

src/utils/singleton.py

@@ -0,0 +1,23 @@
+# Python imports
+
+# Lib imports
+
+# Application imports
+
+
+class SingletonError(Exception):
+    pass
+
+
+
+class Singleton:
+    ccount = 0
+
+    def __new__(cls, *args, **kwargs):
+        obj        = super(Singleton, cls).__new__(cls)
+        cls.ccount += 1
+
+        if cls.ccount == 2:
+            raise SingletonError(f"Exceeded {cls.__name__} instantiation limit...")
+
+        return obj