sdk: Add tutorial for Submodel navigation

sdk/README.md

@@ -124,10 +124,11 @@ write_aas_xml_file(file='Simple_Submodel.xml', data=data)
 For further examples and tutorials, check out the `basyx.aas.examples`-package. Here is a quick overview:
 
 * [`tutorial_create_simple_aas`](./basyx/aas/examples/tutorial_create_simple_aas.py): Create an Asset Administration Shell, including an Asset object and a Submodel
+* [`tutorial_navigate_aas`](./basyx/aas/examples/tutorial_navigate_aas.py): Navigate Asset Administration Shell Submodels using IdShorts and IdShortPaths
 * [`tutorial_storage`](./basyx/aas/examples/tutorial_storage.py): Manage a larger number of Asset Administration Shells in an ObjectStore and resolve references
 * [`tutorial_serialization_deserialization`](./basyx/aas/examples/tutorial_serialization_deserialization.py): Use the JSON and XML serialization/deserialization for single objects or full standard-compliant files
-* [`tutorial_aasx`](./basyx/aas/examples/tutorial_aasx.py): Export Asset Administration Shells with related objects and auxiliary files to AASX package files
 * [`tutorial_backend_couchdb`](./basyx/aas/examples/tutorial_backend_couchdb.py): Use the *Backends* interface (`update()/commit()` methods) to manage and retrieve AAS objects in a CouchDB document database
+* [`tutorial_aasx`](./basyx/aas/examples/tutorial_aasx.py): Export Asset Administration Shells with related objects and auxiliary files to AASX package files
 
 
 ### Documentation

sdk/basyx/aas/examples/tutorial_navigate_aas.py

@@ -0,0 +1,174 @@
+#!/usr/bin/env python3
+# This work is licensed under a Creative Commons CCZero 1.0 Universal License.
+# See http://creativecommons.org/publicdomain/zero/1.0/ for more information.
+"""
+Tutorial for navigating a Submodel's hierarchy using IdShorts and IdShortPaths.
+"""
+
+from basyx.aas import model
+from typing import cast
+
+# In this tutorial, you will learn how to create a Submodel with different kinds of SubmodelElements and how to navigate
+# through them using IdShorts and IdShortPaths.
+#
+# Step-by-Step Guide:
+# Step 1: Create a Submodel with a Property, a Property Collection, a Property List and a Collection List
+# Step 2: Navigate through the Submodel using IdShorts and IdShortPaths
+
+
+########################################################################
+# Step 1: Create a Submodel with a navigable SubmodelElement hierarchy #
+########################################################################
+
+# Step 1.1: Create a Submodel
+submodel = model.Submodel(id_="https://iat.rwth-aachen.de/Simple_Submodel")
+
+# Step 1.2: Add a single Property to the Submodel
+my_property = model.Property(
+    id_short="MyProperty",
+    value_type=model.datatypes.String,
+    value="I am a simple Property"
+)
+submodel.submodel_element.add(my_property)
+
+# Step 1.3: Add a Property Collection to the Submodel
+my_property_collection = model.SubmodelElementCollection(
+    id_short="MyPropertyCollection",
+    value={
+        model.Property(
+            id_short="MyProperty0",
+            value_type=model.datatypes.String,
+            value="I am the first of two Properties within a Property Collection"
+        ),
+        model.Property(
+            id_short="MyProperty1",
+            value_type=model.datatypes.String,
+            value="I am the second of two Properties within a Property Collection"
+        )
+    }
+)
+submodel.submodel_element.add(my_property_collection)
+
+# Step 1.4: Add a Property List to the Submodel
+my_property_list = model.SubmodelElementList(
+    id_short="MyPropertyList",
+    type_value_list_element=model.Property,
+    value_type_list_element=model.datatypes.String,
+    order_relevant=True,
+    value=[
+        model.Property(
+            id_short=None,
+            value_type=model.datatypes.String,
+            value="I am Property 0 within a Property List"
+        ),
+        model.Property(
+            id_short=None,
+            value_type=model.datatypes.String,
+            value="I am Property 1 within a Property List"
+        )
+    ]
+)
+submodel.submodel_element.add(my_property_list)
+
+# Step 1.5: Add a Collection List to the Submodel
+my_property_collection_0 = model.SubmodelElementCollection(
+    id_short=None,
+    value={model.Property(
+        id_short="MyProperty",
+        value_type=model.datatypes.String,
+        value="I am a simple Property within Property Collection 0"
+    )}
+)
+my_property_collection_1 = model.SubmodelElementCollection(
+    id_short=None,
+    value={model.Property(
+        id_short="MyProperty",
+        value_type=model.datatypes.String,
+        value="I am a simple Property within Property Collection 1"
+    )}
+)
+my_property_collection_2 = model.SubmodelElementCollection(
+    id_short=None,
+    value={model.Property(
+        id_short="MyProperty",
+        value_type=model.datatypes.String,
+        value="I am a simple Property within Property Collection 2"
+    )}
+)
+my_collection_list = model.SubmodelElementList(
+    id_short="MyCollectionList",
+    type_value_list_element=model.SubmodelElementCollection,
+    order_relevant=True,
+    value=[my_property_collection_0, my_property_collection_1, my_property_collection_2]
+)
+submodel.submodel_element.add(my_collection_list)
+
+
+#########################################################################
+# Step 2: Navigate through the Submodel using IdShorts and IdShortPaths #
+#########################################################################
+
+# Step 2.1: Access a single Property via its IdShort
+my_property = cast(model.Property, submodel.get_referable("MyProperty"))
+print(f"my_property: id_short = {my_property.id_short}, value = {my_property.value}\n")
+
+# Step 2.2.1: Access a Property within a Property Collection step by step via its IdShort
+my_property_collection = cast(model.SubmodelElementCollection, submodel.get_referable("MyPropertyCollection"))
+my_property_collection_property_0 = cast(model.Property, my_property_collection.get_referable("MyProperty0"))
+print(
+    f"my_property_collection_property_0: "
+    f"id_short = {my_property_collection_property_0}, "
+    f"value = {my_property_collection_property_0.value}"
+)
+
+# Step 2.2.2: Access a Property within a Property Collection via its IdShortPath
+my_property_collection_property_1 = cast(
+    model.Property,
+    submodel.get_referable(["MyPropertyCollection", "MyProperty1"])
+)
+print(
+    f"my_property_collection_property_1: "
+    f"id_short = {my_property_collection_property_1}, "
+    f"value = {my_property_collection_property_1.value}\n"
+)
+
+# Step 2.3.1: Access a Property within a Property List step by step via its index
+my_property_list = cast(model.SubmodelElementList, submodel.get_referable("MyPropertyList"))
+my_property_list_property_0 = cast(model.Property, my_property_list.get_referable("0"))
+print(
+    f"my_property_list_property_0: "
+    f"id_short = {my_property_list_property_0}, "
+    f"value = {my_property_list_property_0.value}"
+)
+
+# Step 2.3.2: Access a Property within a Property List via its IdShortPath
+my_property_list_property_1 = cast(model.Property, submodel.get_referable(["MyPropertyList", "1"]))
+print(
+    f"my_property_list_property_1: "
+    f"id_short = {my_property_list_property_1}, "
+    f"value = {my_property_list_property_1.value}\n"
+)
+
+# Step 2.4.1: Access a Property within a Collection List step by step via its index and IdShort
+my_collection_list = cast(model.SubmodelElementList, submodel.get_referable("MyCollectionList"))
+my_collection_list_collection_0 = cast(model.SubmodelElementCollection, my_collection_list.get_referable("0"))
+my_collection_list_collection_0_property_0 = cast(
+    model.Property,
+    my_collection_list_collection_0.get_referable("MyProperty")
+)
+print(
+    f"my_collection_list_collection_0_property_0: "
+    f"id_short = {my_collection_list_collection_0_property_0}, "
+    f"value = {my_collection_list_collection_0_property_0.value}"
+)
+
+# Step 2.4.2: Access a Property within a Collection List via its IdShortPath
+my_collection_list_collection_2_property_0 = cast(
+    model.Property,
+    submodel.get_referable(["MyCollectionList", "2", "MyProperty"])
+)
+print(
+    f"my_collection_list_collection_2_property_0: "
+    f"id_short = {my_collection_list_collection_2_property_0}, "
+    f"value = {my_collection_list_collection_2_property_0.value}"
+)

sdk/docs/source/tutorials/index.rst

@@ -7,7 +7,8 @@ Tutorials for working with the Eclipse BaSyx Python SDK
    :caption: Contents:
 
    tutorial_create_simple_aas
-   tutorial_serialization_deserialization
+   tutorial_navigate_aas
    tutorial_storage
+   tutorial_serialization_deserialization
    tutorial_backend_couchdb
    tutorial_aasx

sdk/docs/source/tutorials/tutorial_navigate_aas.rst

@@ -0,0 +1,7 @@
+Tutorial: Navigate Submodels
+============================
+
+.. _tutorial_navigate_aas:
+
+.. literalinclude:: ../../../basyx/aas/examples/tutorial_navigate_aas.py
+  :language: python