RFC: asset tutorial without AssetGroups (#7909)

docs/content/tutorial/assets/defining-an-asset.mdx

@@ -75,10 +75,10 @@ Success!
 If you'd rather materialize your asset as a script, you can do that without spinning up Dagit. Just add a few lines to `cereal.py`. This executes a run within the Python process.
 
 ```python file=/guides/dagster/asset_tutorial/cereal.py startafter=start_materialize_marker endbefore=end_materialize_marker
-from dagster import AssetGroup
+from dagster import materialize
 
 if __name__ == "__main__":
-    AssetGroup([cereals]).materialize()
+    materialize([cereals])
 ```
 
 Now you can just run:

docs/content/tutorial/assets/testing-assets.mdx

@@ -24,23 +24,21 @@ def test_nabisco_cereals():
     assert result == [{"name": "cereal1", "mfr": "N"}]
 ```
 
-We'll also write a test for all the assets together. To do that, we need to combine them into an <PyObject object="AssetGroup" />. Then, we can invoke <PyObject object="AssetGroup" method="materialize_in_process" />, which returns an <PyObject module="dagster" object="ExecuteInProcessResult" />, whose methods let us investigate, in detail, the success or failure of execution, the values produced by the computation, and (as we'll see later) other events associated with execution.
+We'll also write a test for all the assets together. To do that, we can put them in a list and then pass it to the <PyObject object="materialize" /> function. That returns an <PyObject object="ExecuteInProcessResult" />, whose methods let us investigate, in detail, the success or failure of execution, the values produced by the computation, and other events associated with execution.
 
-```python file=/guides/dagster/asset_tutorial/complex_asset_graph_tests.py startafter=start_asset_group_test endbefore=end_asset_group_test
-from dagster import AssetGroup
+```python file=/guides/dagster/asset_tutorial/complex_asset_graph_tests.py startafter=start_all_assets_test endbefore=end_all_assets_test
+from dagster import materialize
 
 
-def test_cereal_asset_group():
-    group = AssetGroup(
-        [
-            nabisco_cereals,
-            cereals,
-            cereal_protein_fractions,
-            highest_protein_nabisco_cereal,
-        ]
-    )
+def test_cereal_assets():
+    assets = [
+        nabisco_cereals,
+        cereals,
+        cereal_protein_fractions,
+        highest_protein_nabisco_cereal,
+    ]
 
-    result = group.materialize()
+    result = materialize(assets)
     assert result.success
     assert result.output_for_node("highest_protein_nabisco_cereal") == "100% Bran"
 ```
@@ -57,7 +55,7 @@ Dagster is written to make testing easy in a domain where it has historically be
 
 ## Conclusion
 
-🎉 Congratulations! Having reached this far, you now have a working, tested group of software-defined assets.
+🎉 Congratulations! Having reached this far, you now have a working, tested set of software-defined assets.
 
 What if you want to do more?
 

examples/docs_snippets/docs_snippets/guides/dagster/asset_tutorial/cereal.py

@@ -18,9 +18,9 @@ def cereals():
 # end_asset_marker
 
 # start_materialize_marker
-from dagster import AssetGroup
+from dagster import materialize
 
 if __name__ == "__main__":
-    AssetGroup([cereals]).materialize()
+    materialize([cereals])
 
 # end_materialize_marker

examples/docs_snippets/docs_snippets/guides/dagster/asset_tutorial/complex_asset_graph_tests.py

@@ -20,23 +20,21 @@ def test_nabisco_cereals():
 
 # end_asset_test
 
-# start_asset_group_test
-from dagster import AssetGroup
+# start_all_assets_test
+from dagster import materialize
 
 
-def test_cereal_asset_group():
-    group = AssetGroup(
-        [
-            nabisco_cereals,
-            cereals,
-            cereal_protein_fractions,
-            highest_protein_nabisco_cereal,
-        ]
-    )
+def test_cereal_assets():
+    assets = [
+        nabisco_cereals,
+        cereals,
+        cereal_protein_fractions,
+        highest_protein_nabisco_cereal,
+    ]
 
-    result = group.materialize()
+    result = materialize(assets)
     assert result.success
     assert result.output_for_node("highest_protein_nabisco_cereal") == "100% Bran"
 
 
-# end_asset_group_test
+# end_all_assets_test

examples/docs_snippets/docs_snippets_tests/guides_tests/asset_tutorial_tests/test_complex_asset_graph.py

@@ -1,13 +1,13 @@
-from dagster import AssetGroup
+from dagster import load_assets_from_modules, materialize
 from docs_snippets.guides.dagster.asset_tutorial import complex_asset_graph
 from docs_snippets.guides.dagster.asset_tutorial.complex_asset_graph_tests import (  # pylint: disable=unused-import
-    test_cereal_asset_group,
+    test_cereal_assets,
     test_nabisco_cereals,
 )
 from docs_snippets.intro_tutorial.test_util import patch_cereal_requests
 
 
 @patch_cereal_requests
 def test_complex_asset_graph():
-    result = AssetGroup.from_modules([complex_asset_graph]).materialize()
+    result = materialize(load_assets_from_modules([complex_asset_graph]))
     assert result.success