Add container usage for object provider example

Author: rmk135

examples/providers/object.py

@@ -1,10 +1,14 @@
 """`Object` provider example."""
 
-from dependency_injector import providers
+from dependency_injector import containers, providers
 
 
-object_provider = providers.Object(1)
+class Container(containers.DeclarativeContainer):
+
+ object_provider = providers.Object(1)
 
 
 if __name__ == '__main__':
- assert object_provider() == 1
+ container = Container()
+
+ assert container.object_provider() == 1