Code Widget refactor; observable refactor

src/libs/singleton_raised.py

@@ -0,0 +1,26 @@
+# Python imports
+
+# Lib imports
+
+# Application imports
+
+
+
+class SingletonError(Exception):
+    pass
+
+
+
+class SingletonRaised:
+    _instance = None
+
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is not None:
+            raise SingletonError(f"'{cls.__name__}' is a Singleton. Cannot create a new instance...")
+
+        cls._instance = super(Singleton, cls).__new__(cls)
+        return cls._instance
+
+    def __init__(self):
+        if cls._instance is not None:
+            return