Add example

examples/wiring/flask_resource_closing.py

@@ -0,0 +1,39 @@
+"""`Resource` - Flask request scope example."""
+
+import sys
+
+from dependency_injector import containers, providers
+from dependency_injector.wiring import Provide, Closing
+from flask import Flask, current_app
+
+
+class Service:
+    ...
+
+
+def init_service() -> Service:
+    print('Init service')
+    yield Service()
+    print('Shutdown service')
+
+
+class Container(containers.DeclarativeContainer):
+
+    service = providers.Resource(init_service)
+
+
+def index_view(service: Service = Closing[Provide[Container.service]]):
+    assert service is current_app.container.service()
+    return 'Hello  World!'
+
+
+container = Container()
+container.wire(modules=[sys.modules[__name__]])
+
+app = Flask(__name__)
+app.container = container
+app.add_url_rule('/', 'index', view_func=index_view)
+
+
+if __name__ == '__main__':
+    app.run()